Free tools
Sexual Health & STD Testing Tools
A free suite of anonymous, CDC-grounded tools to help you decide what to do next, from prevention and testing to reading a result and notifying partners. Every one runs entirely in your browser: nothing you enter is sent, saved, or shared.
Prevention
Prevent an infection
Find out, privately, whether the two medicines that prevent STIs and HIV are recommended for you.
Build your prevention plan
A personalized checklist across vaccines, PrEP/PEP, testing, and screening, each linked to a tool.
Open toolDo I need PEP?
Had a possible HIV exposure? Check if you're still in the 72-hour PEP window and what to do now.
Open toolBloodborne exposure risk
A needlestick, shared razor, or unsterile tattoo? Weigh HIV vs hep B vs hep C, each with a different response (PEP, vaccine, or test), plus a 72-hour red flag.
Open toolPrEP eligibility calculator
Score your HIV risk with the validated HIRI-MSM index and see whether PrEP is recommended.
Open toolWhich PrEP is right for me?
Match to the PrEP that fits: daily pill, the every-2-month shot, or the new twice-yearly Yeztugo.
Open toolPrEP 2-1-1 event planner
Enter when you'll take the first double dose → all four pill times with a calendar export. Inside the on-demand PrEP guide.
Open toolHow much does PrEP cost?
Estimate your out-of-pocket PrEP cost by insurance and find your pathway to $0.
Open toolDoxyPEP eligibility checker
Two questions against the CDC 2024 criteria to see if you're a candidate for doxy-PEP.
Open toolWhich vaccines do I need?
HPV, hepatitis A/B, and mpox, build your CDC-based sexual-health vaccine checklist.
Open toolWhen am I protected on PrEP?
Just started PrEP? Your PrEP type + the sex you have → the exact day you reach full protection (about 7 days for anal, 20 for vaginal), and when you still need condoms.
Open toolStop BV & yeast coming back
Stuck in a cycle? Your triggers and history → a tailored, evidence-based prevention plan: what actually helps, what to skip, and when recurrence means see a clinician.
Open toolVasectomy: Is It Right for Me?
Answer a few questions for a tailored read on permanence, the two techniques, and what a vasectomy does (and doesn't) change — plus a recovery timeline shaped to your activity level. The key fact it's built around: you're not sterile until a semen test confirms it.
Open toolTubal Ligation vs the Alternatives
Weighing getting your tubes tied? A private 5-question guide comparing tubal ligation and salpingectomy with reversible IUDs, the implant, and a partner's vasectomy — all over 99% effective, so the real question is permanent vs keeping the door open.
Open toolIUD Strings & Expulsion Self-Check
Felt for your IUD strings and unsure what's normal? Say what you notice and see whether it's reassuring or worth a provider check. Private and educational, not a diagnosis.
Open toolIUD Insertion: What to Expect & How to Prepare
Walk into your IUD appointment ready — what happens step by step, the pain-relief options to ask about, and when you're protected — with a private checklist you tick off. Educational, nothing saved.
Open toolHPV Vaccine Dose Planner
How many HPV vaccine doses do you need — 2 or 3 — and when? This private planner uses the CDC/ACIP schedule to work out your series and the timing from your age and doses so far. Educational, not medical advice.
Open toolHow to skip or delay your period
Pick the method you're on — pill, patch, ring, hormonal IUD, shot, or implant — and see whether you can safely skip or delay your period and exactly how. Grounded in ACOG, CDC, and FSRH guidance. Private and runs in your browser.
Open toolWhich prevention actually works?
Pick what you want to protect against and see condoms, PrEP, doxy-PEP, vaccines and U=U ranked by real effectiveness, with the gap each one leaves.
Open toolThe condom broke, what now?
An urgent action plan: the HIV-PEP (72h) and emergency-contraception (5-day) clocks, plus testing.
Open toolWhich morning-after option?
Time since sex × weight → the most reliable emergency contraception (copper IUD, ella, or Plan B) and the weight limits people don't hear about.
Open toolCondom fit & lube check
Does oil break your condom? What size do you need? Check lube compatibility and find your fit by girth, the two quiet causes of breakage.
Open toolMixed-status couple planner
One partner HIV-positive, one negative → your options: U=U, PrEP for the negative partner, and safer conception. Inside the condoms-vs-PrEP guide.
Open toolHep B vaccine dose dates
First-dose date + your product → the earliest date for each remaining dose on the CDC schedule, with a calendar reminder. Inside the hep B vaccine guide.
Open toolMissed a PrEP dose?
PrEP type + kind of sex + doses taken → whether you're still protected, since the threshold differs for anal vs vaginal sex. Inside the PrEP effectiveness guide.
Open toolBirth Control Safety Check
A private check based on the CDC's Medical Eligibility Criteria: tell us your health conditions and see whether the combined pill, patch, or ring is safe for you — and which estrogen-free methods stay options if it isn't. A screen, not a prescription.
Open toolBirth Control Effectiveness Comparison
Compare every birth-control method by real-world and perfect-use pregnancy rates, using CDC data. Sort by typical or perfect use and filter by hormone-free or long-acting — see what's most effective at a glance.
Open toolMissed Birth Control — What To Do
Late or missed a pill, patch, ring, or shot? This private tool walks your situation through the CDC's exact recommended actions — take it now, use backup, or consider emergency contraception. Not a prescription.
Open toolAm I Protected Yet? (Backup Calculator)
Just started a new birth control method? See whether you're protected yet or still need a backup method — and for exactly how long — using CDC guidance. A quick, private check, not a prescription.
Open toolBirth Control Renewal Reminder
When does your IUD, implant, or shot expire? Enter the date it was placed and your method to see exactly when it's due for replacement — using FDA-approved durations. Private, in your browser.
Open toolWhich Birth Control Is Right for You?
Answer a few questions about what matters most — effectiveness, hormones, upkeep, periods, reversibility, breastfeeding — and get a private, ranked shortlist of methods that fit, with typical-vs-perfect effectiveness on each.
Open toolDoes My Birth Control Protect Against STIs?
Pick your birth-control method for the blunt answer on STIs — only condoms protect, everything else gives zero — then get a dual-protection plan pairing your method for pregnancy with condoms for STIs, when to add PrEP and testing, and a link to screening.
Open toolHow Much Does Birth Control Cost?
Estimate your out-of-pocket price by method and insurance situation — and find the $0 routes most people miss: the ACA free-coverage mandate, Title X clinics, Medicaid family planning, and over-the-counter Opill.
Open toolBirth Control Without a Prescription
Which birth control you can get without a doctor's visit — over the counter, from a pharmacist, or by telehealth — and which methods still need an in-person procedure. Pick your state to see whether a pharmacist can prescribe the pill where you live. Private and in-browser.
Open toolSwitching Birth Control
Changing from one birth control method to another? This private planner uses the CDC's rules to show how to switch without a pregnancy gap — start before you stop, how many days of backup, and when emergency contraception matters. Educational, not a prescription.
Open toolBirth Control Side Effects: Is This Normal?
Pick your method and the symptom you're noticing to see if it's a normal adjustment, worth mentioning, or a warning sign to act on now.
Open toolExposed to Mpox? Check Your Vaccine Timing
Think you were exposed to mpox? A private, 3-question check on whether the JYNNEOS vaccine can still help and how fast you must act — ideally within 4 days to prevent it.
Open toolHormonal vs Non-Hormonal Birth Control
Answer five quick questions to see whether a hormonal or non-hormonal method fits you — with the specific methods on each side and the honest effectiveness gap, from the copper IUD's under 1% to fertility-awareness's ~2–23%.
Open toolLate for your Depo shot?
Enter your last Depo-Provera date to see how many weeks it's been and where you stand: on schedule, inside the CDC 15-week grace period, or past it. Shows your next-shot-due and grace-window dates, whether you need a backup method or EC, plus an optional calendar reminder. Private and on-device.
Open toolStopping Birth Control: When Does Fertility Return?
Coming off birth control? Pick the method you're stopping and see when fertility typically returns — right away for the pill, patch, ring, IUD, and implant, but a normal few-month delay after the shot (DMPA). What to expect for your periods, plus the trying-to-conceive next steps. Private, educational, not a diagnosis.
Open toolTesting
Test at the right time
Know when a test is accurate, which tests you need and what they cost, and what your result actually means.
STD symptom checker
Describe what you're noticing, anonymously, and see which infections fit, how urgent it is, and the right test. Worried about one in particular? Every per-condition checker is in the strip below the suite.
Open toolEvery STD & STI
Browse and compare every STD & STI in one filterable place: search or filter by type, with symptoms, testing, and treatment for each.
Open toolSTD & STI FAQ library
Every question we answer across the site — testing, windows, symptoms, cost, privacy — searchable in one place, each linked to its full guide.
Open toolSTD myths vs facts
Myth or fact? Test what you know, toilet seats, oral, the pill, PrEP, with an instant CDC-grounded answer to each, then read the full library.
Open toolWhich test do I need?
Build a personalized CDC-based panel, which infections, which body sites, how often, plus what you don't need.
Open toolChances from one time
Per-encounter transmission ranges by infection and act, with the honest caveats. The only way to know is to test.
Open toolTest-window calculator
Enter a possible exposure date to see when each STI test becomes reliable.
Open toolWhen do symptoms appear?
Incubation periods by infection, when symptoms show after exposure (and why silence isn't safety).
Open toolWhen's my next test due?
Last test date × your situation → a next-due date on the CDC schedule, with a one-tap calendar reminder.
Open toolFind testing & cost
Match to a clinic, at-home kit, or free option near you, with a clear cost estimate.
Open toolWhich at-home kit is right for me?
Pick the infections you need and what matters most (speed, price, rating, in-store) → ranked from the real kits we review. On the best-at-home-tests page.
Open toolHow much does testing cost?
Pick where you'd test and your insurance for an out-of-pocket range, plus the free and $0 pathways.
Open toolHepatitis C result reader
Enter your HCV antibody + RNA for what it means: never infected, cleared/cured, or a current (curable) infection. Inside the hep C testing guide.
Open toolHerpes blood-test reader
Enter your HSV-1/HSV-2 IgG (and the HSV-2 index) for what it means, including the low-positive false-positive trap. Inside the herpes testing guide.
Open toolIs my STD curable?
Pick an infection for the honest answer: cured with a course of medicine, managed for life, or something your body often clears, plus what happens if you wait.
Open toolUTI or STD?
Burning when you pee? Weigh your symptoms across a UTI and the STIs that mimic it (chlamydia, gonorrhea, NGU), with the red flags that mean go now.
Open toolWhich STD panel should I order?
Your situation → the right panel shape (common core, broad 10-test, or a single test), with honest timing caveats and what stock panels quietly miss.
Open toolWhat does my panel miss?
Tick the tests you had → the gaps versus the CDC-recommended screen for your profile, from throat and rectal swabs to trichomoniasis.
Open toolWhat would I pay at a sliding-scale clinic?
Household size + income → your federal-poverty-level band and the sliding-scale fee tier that community health centers use.
Open toolWhat happens at an STD test?
Where you test × which tests → a step-by-step walkthrough: urine vs swab vs blood, and why most people never need a urethral swab.
Open toolIs my partner's negative reassuring?
What a partner was tested for + when → what that negative actually rules out vs misses (window, wrong sites, infections off the panel, herpes rarely tested).
Open toolChances a new partner has an STD?
A non-judgmental, population-based read on the risk an untested partner is carrying something silent, and one honest answer: test together first.
Open toolHas my HPV cleared yet?
HPV type + age + time since your positive result → the typical clearance window and, above all, when to re-screen. Most clears; screening catches what doesn't.
Open toolPrEP Lab & Follow-Up Schedule
Pick your PrEP type and start date to map the CDC monitoring schedule — the baseline workup, then when each HIV test, kidney check, STI screen, and hep-C test comes due. Runs entirely in your browser.
Open toolHIV CD4 & viral-load reader
Enter your CD4 count and viral load → what the numbers mean: immune status, the <200 threshold, and what undetectable / U=U means. Inside the CD4/viral-load guide.
Open toolCan an STD affect fertility?
Pick an infection to see its real effect on fertility: and why the risk is almost always about going untreated, not the infection itself.
Open toolDo I need a Pap or HPV test?
Cervical cancer screening by age: Pap vs HPV, how often, and the new at-home self-collection option.
Open toolTrans & nonbinary screening
STI screening by your anatomy and behaviors, not your gender: site-specific, affirming, CDC-based.
Open toolDo I need testing after 50?
STIs are rising fastest in older adults, yet doctors rarely ask. Your situation → a CDC-based answer, plus why menopause doesn't end the risk.
Open toolSTI testing in pregnancy
Which prenatal tests, and at which visit? Stage × age × risk → your CDC-based schedule, incl. the syphilis rechecks that prevent congenital syphilis.
Open toolDo I need urgent care now?
Fever, severe pelvic or testicular pain, an eye or a spreading infection? Triage how urgently your STI symptoms need to be seen, and where. Inside the urgent-care guide.
Open toolHIV risk of one act
Act + partner status + condom/PrEP → the CDC per-exposure estimate, with U=U applied. A population average, never a personal verdict. Inside the HIV risk guide.
Open toolCan you get an STD from…?
Kissing, oral, sex toys, a toilet seat? Which STIs can and can't spread by each activity, myths busted.
Open toolA partner told me they're positive
The infection they named + how recently → your action plan: PEP/hep-B windows, presumptive treatment, and when to test. Inside the new-partner testing guide.
Open toolHow often should I get tested?
Your profile and risk flags → the CDC screening panel that applies to you, how often to repeat it, and a calendar reminder. Inside the screening-frequency guide.
Open toolTest-results interpreter
Pick a test and result, positive, negative, reactive, indeterminate, for plain-language meaning and next steps.
Open toolHepatitis B panel reader
Enter your three-marker panel (HBsAg, anti-HBs, anti-HBc) for the CDC reading: susceptible, immune, recovered, or active infection. Lives inside the hep B results guide.
Open toolPap / HPV result reader
Enter your Pap (ASC-US, LSIL, HSIL…) and HPV result for the plain meaning and the ASCCP next step: routine, repeat, or colposcopy. Inside the Pap-vs-HPV guide.
Open toolDo I need anal cancer screening?
HIV status + age + risk → whether anal Pap screening is recommended for you, per the 2024 guidelines. Inside the anal-Pap guide.
Open toolIs my negative HIV result final?
Test type + exposure date → whether a negative is conclusive yet or when to retest, by each test's window. Inside the HIV window guide.
Open toolBV, yeast, or an STI?
Discharge, itch, or odor? See which causes fit: and why trich (an STI) mimics them, so only testing tells.
Open toolGenital bumps & sores
Herpes, wart, pimple, or normal? Describe a bump or sore and see which causes fit, how to tell them apart, and how urgently to act.
Open toolCould this be acute HIV?
Timing since exposure + your symptoms → how it fits seroconversion illness and which HIV test to ask for now, with a PEP-window flag. Inside the HIV symptoms guide.
Open toolWhich syphilis stage fits?
Tick the signs and rough timeline → the likely stage (primary, secondary, latent, or a neuro red-flag) and the test that confirms it. Inside the syphilis stages guide.
Open toolCan My Partner Get Treated Without a Visit?
See whether expedited partner therapy (EPT) — getting your recent partner treated for chlamydia or gonorrhea without their own visit — is legally allowed in your state, plus how to ask your clinician and what it covers.
Open toolAfter a diagnosis
After a positive result
Turn a diagnosis into clear dates: when it's safe again, when to retest, and who to tell.
Will my STI meds affect my birth control?
Almost always no. Your method + prescribed medicine → whether you need backup, and the one real exception (the TB drug rifampin) people confuse.
Open toolIs my syphilis treatment working?
Enter your before-and-after RPR titers to see whether the drop meets the 4-fold fall that signals a cure.
Open toolPartner look-back calculator
Work out how far back to notify partners for each infection, by diagnosis date.
Open toolDisclosure script writer
Get a kind, copyable message to tell a partner yourself, tuned to the infection and your relationship.
Open toolProtect a partner from herpes
Have herpes? See how much antivirals, condoms, and avoiding outbreaks lower the risk, with real numbers.
Open toolAm I untransmittable? (U=U)
On HIV treatment? See whether Undetectable = Untransmittable applies to you yet, and exactly what it does and doesn't cover.
Open toolAnonymous partner notifier
Send a partner a confidential heads-up to get tested: no names, no account.
Open toolWhich wart treatment fits?
Location + pregnancy + home vs clinic → the CDC options that apply, with the ones to avoid flagged. Inside the genital warts treatment guide.
Open toolCan I drink on this medicine?
Pick your STI medicine for the alcohol rule plus the food, sun, and timing cautions that matter. Inside the alcohol-and-antibiotics guide.
Open toolTreatment timeline + retest reminder
Get your safe-to-have-sex date and 3-month retest date, with a calendar (.ics) export.
Open toolReinfection or treatment failure?
Symptoms back after treatment? Work out whether it's a new reinfection, an untreated partner, or treatment that didn't clear it, and what to do next. Inside the reinfection guide.
Open toolDaily pill or treat each outbreak?
Outbreak frequency + bother + partner → whether daily suppressive therapy is worth discussing or episodic fits. Inside the herpes treatment guide.
Open toolWhen will I be undetectable?
Start date + regimen + starting viral load → your projected road to an undetectable result and to durable U=U, with viral-load reminders. Inside the ART guide.
Open toolData & privacy
Know your area and your rights
Local infection data and the state laws that protect a confidential test.
STD rates by state & county
Compare chlamydia, gonorrhea, syphilis and HIV rates and trends where you live.
Open toolConfidential testing by state
Minor-consent age and partner-treatment (EPT) rules for every state, plus insurance-privacy tips.
Open toolCan I donate blood?
The FDA's 2023 rules ask everyone the same questions: check your eligibility (including on PrEP) and, if deferred, when you can donate.
Open toolSexual wellbeing
Sexual function & wellbeing
Private, validated self-checks for the parts of sexual health that aren't about infections, with plain next steps.
Female sexual function (FSFI-6)
A validated 6-question screen across desire, arousal, lubrication, orgasm, satisfaction and pain, with your score and what it suggests.
Open toolProstate Symptom Score (IPSS)
Score your urinary symptoms with the validated, public-domain IPSS — seven questions that land your total from mild to severe and point you toward the right next step. A symptom score, not a diagnosis, that runs entirely in your browser.
Open toolTestosterone Unit Converter
Convert a total testosterone result between ng/dL, nmol/L, and ng/mL in one step, with the exact molar-mass math. A private math utility — it converts units, it doesn't interpret or diagnose.
Open toolOsteoporosis & Fracture Risk Check
Check your fracture risk against the well-known clinical risk factors and see whether it's time to discuss a DXA bone-density scan. A private, factor-based screen for postmenopausal women and older adults — not the FRAX score or a diagnosis.
Open toolWhen will I reach menopause?
Enter your age and a few factors for a realistic menopause window, anchored on the ~51 average (most people between 45 and 55). An honest estimate that gives you a window, never a date — because no test can forecast one.
Open toolSperm DNA Fragmentation (DFI) Interpreter
Enter your DNA Fragmentation Index (DFI %) to read it against the commonly-cited low, moderate, and high bands — the DNA damage a standard semen analysis doesn't measure. Private and in-browser; band edges vary by assay, so it's context for a specialist, never a diagnosis.
Open toolHot flash tracker
Log hot flashes and night sweats in one tap — with optional severity and triggers — and watch your daily and weekly counts and top triggers build into a real picture for your clinician. Opt-in and on-device only: a private logger, never a diagnosis.
Open toolFSH & Menopause Interpreter
Enter your FSH blood level with your age and where your periods are to see what a high FSH does — and doesn't — say about menopause. A single value swings in perimenopause, so it's a clue, not a diagnosis.
Open toolTestosterone Therapy (TRT) Monitoring Schedule
On or considering testosterone therapy? See what a clinician confirms before you start and what gets rechecked — testosterone, blood count, and PSA/prostate — at 3, 6, and 12 months, then yearly. Educational, no doses.
Open toolAdenomyosis Symptom Checker
A private symptom check for adenomyosis — heavy or prolonged periods, severe menstrual cramps, chronic pelvic pain, an enlarged or tender uterus, and pain during sex — with whether the pattern is worth raising with a gynecologist. A guide, not a diagnosis.
Open toolMissed or Absent Periods Checker
A private checker for missed or absent periods: it rules out pregnancy first, then sorts the pattern into primary or secondary amenorrhea and weighs the common causes — so you know whether it's worth a clinician's look. A guide, not a diagnosis.
Open toolInterstitial Cystitis / Bladder Pain Checker
A private symptom check for interstitial cystitis / bladder pain syndrome — bladder pain that worsens as the bladder fills, urgency and frequency, pain with sex, and symptoms lasting over six weeks without an infection. It tells you whether the pattern is worth raising with a urologist. A guide, not a diagnosis.
Open toolBladder leak checker
A private checker that reads whether your bladder leaks look more like stress incontinence (leaks with coughing, laughing, or exercise) or urge incontinence / overactive bladder (a sudden strong urge, then leaking) — or a mix. Leaks are common and treatable. A pattern read, never a diagnosis.
Open toolGynecomastia Checker
A private checker for enlarged male breast tissue (gynecomastia): it weighs whether the tissue feels like firm glandular tissue or soft fat, one side or both, tenderness, and the common contexts — and tells you whether the pattern fits and what a clinician should check. Usually benign, never a diagnosis.
Open toolPeyronie's Disease Checker
A private symptom checker for Peyronie's disease — a new penile curve or bend, a firm plaque you can feel, pain with erections, shortening, or trouble with penetration — with whether the pattern is worth seeing a urologist about. A guide, not a diagnosis.
Open toolScrotal Swelling Checker
A private checker for a painless or aching scrotal swelling. Answer a few questions about where it sits and how it behaves to see which common, usually-benign pattern it most resembles — a fluid hydrocele, a 'bag of worms' varicocele, an epididymal cyst, or a hernia. It's a pattern read, never a diagnosis: any new scrotal swelling should be examined, and a scrotal ultrasound is what clarifies it.
Open toolProstatitis Symptom Checker
A private symptom checker for prostatitis and chronic pelvic pain syndrome in men — pelvic or genital pain, painful or difficult urination, urgency, and pain with ejaculation — informed by the NIH Chronic Prostatitis Symptom Index. It tells you whether the pattern is worth raising with a clinician or urologist. A guide, not a diagnosis.
Open toolPainful Sex (Dyspareunia) Checker
A private, judgment-free check for painful sex (dyspareunia). It reads where the pain is, its timing, dryness, muscle tightness, cyclical deep pain, or after childbirth — and points you toward the right care: gynecology, pelvic-floor physical therapy, or menopause care. A guide, not a diagnosis. Painful sex is common and treatable.
Open toolVaginismus Checker
A private, gentle checker for vaginismus — the involuntary pelvic-floor tightening that makes penetration (sex, tampons, or a pelvic exam) painful or impossible, despite normal desire. It reads whether the pattern fits and routes you to a gynecologist and pelvic-floor physical therapist. It is common and highly treatable — never a diagnosis.
Open toolVulvodynia Checker
A private check for vulvodynia — chronic vulvar burning, stinging, rawness, or aching lasting 3 months or longer with no clear cause. It reads whether the pattern is worth raising with a gynecologist or vulvar specialist, and pelvic-floor physical therapy. Vulvodynia is real, common, and treatable — not 'in your head.' A guide, not a diagnosis.
Open toolLichen Sclerosus Checker
A private symptom checker for lichen sclerosus — white, thin, crinkled patches on the vulva, anus, penis or foreskin, intense itching, soreness, and skin that splits easily — with whether the pattern is worth a dermatologist or gynecologist's look. A guide, not a diagnosis.
Open toolBartholin's Cyst or Abscess Checker
A private checker for a lump beside the opening of the vagina: it reads whether the pattern fits a simple Bartholin's cyst, an infected abscess that needs draining, or something else — and always routes to a clinician. A pattern read, never a diagnosis.
Open toolPelvic Organ Prolapse Checker
A private symptom check for pelvic organ prolapse — pressure or heaviness, a bulge 'coming down' at the vaginal opening, or trouble fully emptying the bladder or bowel. It reads whether the pattern fits and which type it may resemble, and routes you to a urogynecologist or gynecologist. A guide, not a diagnosis.
Open toolBalanitis Checker
A private symptom check for balanitis — redness, soreness, swelling, itching, or discharge on the head of the penis. See whether the pattern is worth a clinician's look and a swab, what tends to cause it, and the one emergency that needs care now. A guide, not a diagnosis.
Open toolTesticle Pain Checker
A private checker for a painful testicle. It first screens for the signs of testicular torsion — a true emergency — then reads whether a gradually-painful, swollen, tender testicle fits the epididymitis or orchitis pattern that needs prompt antibiotics and STI testing. A guide, not a diagnosis, and nothing you enter leaves your device.
Open toolEndometrial Thickness Interpreter
Enter your endometrial thickness (the "stripe" in mm from a transvaginal ultrasound) and your situation to see what the number generally means. After menopause with bleeding, a stripe of 4 mm or less is reassuring on that scan — but persistent bleeding still needs evaluation whatever the number. Premenopausal thickness has no single cutoff. Private, in-browser, not a diagnosis.
Open toolPSA Test Interpreter
Enter your PSA result and age to see it in plain English, with the benign reasons a PSA can be high and the shared-decision framing the USPSTF and AUA use. PSA is a screening signal, not a diagnosis — this tool never tells you whether you have cancer, it routes you to the right clinician.
Open toolDelayed Ejaculation Checker
A private checker for trouble reaching orgasm. It reads whether persistent difficulty ejaculating — despite enough desire, arousal, and stimulation — fits delayed ejaculation, sorts lifelong from acquired and situational from generalized, and flags common, treatable contributors like SSRIs, alcohol, low testosterone, or anxiety. It's well-recognized and often treatable — a guide, not a diagnosis, and nothing you enter leaves your device.
Open toolIs Your ED Physical or Psychological?
A private, in-browser checker that reads whether erection difficulties point more toward a psychological or situational cause or a physical or vascular one — using the classic clue of morning and night-time erections. A guide, not a diagnosis, and nothing you enter leaves your device.
Open toolUterine Fibroids Symptom Checker
A private symptom check for uterine fibroids — heavy or prolonged periods, pelvic pressure or fullness, frequent urination, constipation, pain with sex, a lower-belly swelling, and fertility concerns — with whether the pattern is worth raising with a gynecologist. A guide, not a diagnosis.
Open toolOvarian Cyst Symptom Checker
A private symptom check for ovarian cysts — one-sided pelvic pain or pressure, bloating, feeling full quickly, pain during sex, and period changes — with whether the pattern is worth a gynecology ultrasound. Includes an emergency gate for signs of torsion or rupture. A guide, not a diagnosis.
Open toolPerimenopause Bleeding Checker
A private checker for bleeding in the menopause transition: it sorts your pattern into expected-perimenopausal or a 'get it checked' pattern, and always flags the one rule that matters most — any bleeding 12+ months after your last period needs prompt evaluation. A guide, not a diagnosis.
Open toolRetrograde Ejaculation Checker
A private checker for a dry or much-reduced orgasm. It reads whether little or no semen at climax — often with cloudy urine afterward — fits retrograde ejaculation, where semen goes backward into the bladder. It isn't harmful to your health, but it matters for fertility and a urologist can confirm it with a simple urine test. A guide, not a diagnosis, and nothing you enter leaves your device.
Open toolLow Testosterone Symptom Screener (ADAM)
A private, validated 10-question screener (the ADAM questionnaire) for symptoms of low testosterone in men — with what your answers point to and what a blood test would confirm. A screen, not a diagnosis.
Open toolMenopause Symptom Score (MRS)
A private, validated 11-question menopause symptom check (the Menopause Rating Scale). Score your hot-flash, mood, and vaginal/urinary symptoms by severity — and see what's worth raising with a clinician. A screen, not a diagnosis.
Open toolPCOS Symptom Checker
Weighs the two PCOS features you can notice yourself — irregular periods and signs of excess androgens — against the clinical Rotterdam criteria, and tells you whether the pattern is worth raising with a clinician. A private pattern read, never a diagnosis.
Open toolEndometriosis Symptom Checker
Painful periods, pelvic pain, or pain with sex? A private, 7-question check of whether your symptoms fit the pattern worth raising with a gynecologist — a guide, not a diagnosis.
Open toolPMS or PMDD? Premenstrual Symptom Identifier
Tell PMS apart from the more severe, mood-dominated pattern of PMDD using the DSM-5 criteria and ACOG guidance. A private starting point that points you toward daily tracking and a clinician, not a diagnosis.
Open toolErectile function (IIEF-5)
The validated 5-question SHIM/IIEF-5 screen for erectile difficulty, with your severity band and why it's worth a check-up. Inside the ED guide.
Open toolPremature Ejaculation Self-Test (PEDT)
A private, validated 5-question screen (the Premature Ejaculation Diagnostic Tool) that scores how likely PE is — with what your total means and what actually helps. A screen, not a diagnosis.
Open toolLow Libido Screener (DSDS) for Women
A private, validated 5-question screener for low sexual desire in women (HSDD). See whether your answers fit a pattern worth discussing — and what commonly, and treatably, lowers desire. A screen, not a diagnosis.
Open toolRelationship Satisfaction Check
A private, 7-question reflection on how satisfied you feel in your relationship, based on the validated Relationship Assessment Scale. See where things stand and what's worth talking about — a reflection, not a verdict.
Open toolIs My Sexual Behavior Out of Control? (PATHOS)
A private, validated 6-question screen for sexual behavior that feels out of control. See whether your answers point to something worth talking about — compassionately, and pointed at help. A screen, not a diagnosis.
Open toolErection Hardness Score (Quick Check)
A private, 10-second check using the validated Erection Hardness Score: grade your erection firmness from 0 to 4 and see what it means — and when a fuller erectile screen or a clinician makes sense. A screen, not a diagnosis.
Open toolVaginal Dryness & GSM Symptom Check
A private symptom check for vaginal dryness, irritation, pain with sex, and urinary changes (genitourinary syndrome of menopause). See how much your symptoms point to GSM and what treats it. A screen, not a diagnosis.
Open toolFree & Bioavailable Testosterone Calculator
Estimate free and bioavailable testosterone from your total-T, SHBG, and albumin using the published Vermeulen equation — and see why free-T can read low even when total-T looks normal. Private and educational, not a diagnosis.
Open toolPerimenopause Stage Quiz
Answer a few questions about your cycle and symptoms to see where you likely are in the menopause transition — premenopause, early or late perimenopause, or postmenopause — using the STRAW+10 staging system, with the bleeding changes worth a clinician's look.
Open toolMenopausal Hormone Therapy Eligibility
A private, in-browser check based on The Menopause Society (NAMS) and ACOG guidance: tell us your symptoms, how far you are past menopause, and your health history, and see whether menopausal hormone therapy could be worth discussing — or whether low-dose vaginal estrogen, non-hormonal options, or a specialist conversation fit better. A guide to a conversation, not a prescription.
Open toolIs My Sex Life Normal?
A judgment-free look at how often you have sex against US national survey averages for your age and relationship status — shown as a wide normal range, never a target. There's no correct number: satisfaction and consent matter more.
Open toolKegel exercise timer
A guided pelvic-floor timer that paces every hold and rest, counts your reps and sets, and logs daily practice on your device only.
Open toolTesticular Self-Exam & Lump Checker
Learn the two-minute monthly check, then tick what you're noticing to see what a lump or change might mean — and when to get it looked at. Testicular cancer caught early is highly curable. Private, and never a diagnosis.
Open toolEvery situation has a next stop
The whole suite as one map, find where you are and ride the line. Full descriptions live in the .
5 lines · 151 stations
Prevent line
Before anything happens
- Build your prevention plan Planner
- Do I need PEP? Checker · 72-hour clock
- Bloodborne exposure risk Assessment
- PrEP eligibility calculator Calculator
- Which PrEP is right for me? Chooser
- PrEP 2-1-1 event planner Planner
- How much does PrEP cost? Estimator
- DoxyPEP eligibility checker Checker
- Which vaccines do I need? Checker
- When am I protected on PrEP? Calculator
- Stop BV & yeast coming back Planner
- Vasectomy: Is It Right for Me? Tool
- Tubal Ligation vs the Alternatives Tool
- IUD Strings & Expulsion Self-Check Tool
- IUD Insertion: What to Expect & How to Prepare Tool
- HPV Vaccine Dose Planner Tool
- How to skip or delay your period Tool
- Which prevention actually works? Guide
- The condom broke, what now? Guide
- Which morning-after option? Guide
- Condom fit & lube check Guide
- Mixed-status couple planner Guide
- Hep B vaccine dose dates Guide
- Missed a PrEP dose? Guide
- Birth Control Safety Check Tool
- Birth Control Effectiveness Comparison Tool
- Missed Birth Control — What To Do Tool
- Am I Protected Yet? (Backup Calculator) Tool
- Birth Control Renewal Reminder Tool
- Which Birth Control Is Right for You? Tool
- Does My Birth Control Protect Against STIs? Tool
- How Much Does Birth Control Cost? Tool
- Birth Control Without a Prescription Tool
- Switching Birth Control Tool
- Birth Control Side Effects: Is This Normal? Tool
- Exposed to Mpox? Check Your Vaccine Timing Tool
- Hormonal vs Non-Hormonal Birth Control Tool
- Late for your Depo shot? Tool
- Stopping Birth Control: When Does Fertility Return? Tool
- Exposed anyway? Change here for the Test line
Test line
Something happened: or it's time
- STD symptom checker Checker · 24 condition quizzes
- Every STD & STI Library · connects everywhere
- STD & STI FAQ library Library
- STD myths vs facts Quiz
- Which test do I need? Builder
- Chances from one time Explainer
- Test-window calculator Calculator
- When do symptoms appear? Timeline
- When's my next test due? Scheduler
- Find testing & cost Finder · clinics · kits · free
- Which at-home kit is right for me? Chooser
- How much does testing cost? Estimator
- Hepatitis C result reader Interpreter
- Herpes blood-test reader Interpreter
- Is my STD curable? Lookup
- UTI or STD? Checker
- Which STD panel should I order? Chooser
- What does my panel miss? Auditor
- What would I pay at a sliding-scale clinic? Estimator
- What happens at an STD test? Guide
- Is my partner's negative reassuring? Auditor
- Chances a new partner has an STD? Estimator
- Has my HPV cleared yet? Timeline
- PrEP Lab & Follow-Up Schedule Tool
- HIV CD4 & viral-load reader Guide
- Can an STD affect fertility? Guide
- Do I need a Pap or HPV test? Guide
- Trans & nonbinary screening Guide
- Do I need testing after 50? Guide
- STI testing in pregnancy Guide
- Do I need urgent care now? Guide
- HIV risk of one act Guide
- Can you get an STD from…? Guide
- A partner told me they're positive Guide
- How often should I get tested? Guide
- Test-results interpreter Guide
- Hepatitis B panel reader Guide
- Pap / HPV result reader Guide
- Do I need anal cancer screening? Guide
- Is my negative HIV result final? Guide
- BV, yeast, or an STI? Guide
- Genital bumps & sores Guide
- Could this be acute HIV? Guide
- Which syphilis stage fits? Guide
- Can My Partner Get Treated Without a Visit? Tool
- Tested positive? Change here for the After line
After line
You have a result
- Will my STI meds affect my birth control? Lookup
- Is my syphilis treatment working? Tracker
- Partner look-back calculator Calculator
- Disclosure script writer Generator
- Protect a partner from herpes Guide
- Am I untransmittable? (U=U) Checker
- Anonymous partner notifier Generator · no names, no account
- Which wart treatment fits? Guide
- Can I drink on this medicine? Guide
- Treatment timeline + retest reminder Guide
- Reinfection or treatment failure? Guide
- Daily pill or treat each outbreak? Guide
- When will I be undetectable? Guide
- Retest in 3 months: back to the Test line
Area line
Where you live matters
Wellbeing line
Beyond infections
- Female sexual function (FSFI-6) Self-check
- Prostate Symptom Score (IPSS) Tool
- Testosterone Unit Converter Tool
- Osteoporosis & Fracture Risk Check Tool
- When will I reach menopause? Tool
- Sperm DNA Fragmentation (DFI) Interpreter Tool
- Hot flash tracker Tool
- FSH & Menopause Interpreter Tool
- Testosterone Therapy (TRT) Monitoring Schedule Tool
- Adenomyosis Symptom Checker Tool
- Missed or Absent Periods Checker Tool
- Interstitial Cystitis / Bladder Pain Checker Tool
- Bladder leak checker Tool
- Gynecomastia Checker Tool
- Peyronie's Disease Checker Tool
- Scrotal Swelling Checker Tool
- Prostatitis Symptom Checker Tool
- Painful Sex (Dyspareunia) Checker Tool
- Vaginismus Checker Tool
- Vulvodynia Checker Tool
- Lichen Sclerosus Checker Tool
- Bartholin's Cyst or Abscess Checker Tool
- Pelvic Organ Prolapse Checker Tool
- Balanitis Checker Tool
- Testicle Pain Checker Tool
- Endometrial Thickness Interpreter Tool
- PSA Test Interpreter Tool
- Delayed Ejaculation Checker Tool
- Is Your ED Physical or Psychological? Tool
- Uterine Fibroids Symptom Checker Tool
- Ovarian Cyst Symptom Checker Tool
- Perimenopause Bleeding Checker Tool
- Retrograde Ejaculation Checker Tool
- Low Testosterone Symptom Screener (ADAM) Tool
- Menopause Symptom Score (MRS) Tool
- PCOS Symptom Checker Tool
- Endometriosis Symptom Checker Tool
- PMS or PMDD? Premenstrual Symptom Identifier Tool
- Erectile function (IIEF-5) Guide
- Premature Ejaculation Self-Test (PEDT) Tool
- Low Libido Screener (DSDS) for Women Tool
- Relationship Satisfaction Check Tool
- Is My Sexual Behavior Out of Control? (PATHOS) Tool
- Erection Hardness Score (Quick Check) Tool
- Vaginal Dryness & GSM Symptom Check Tool
- Free & Bioavailable Testosterone Calculator Tool
- Perimenopause Stage Quiz Tool
- Menopausal Hormone Therapy Eligibility Tool
- Is My Sex Life Normal? Tool
- Kegel exercise timer Tool
- Testicular Self-Exam & Lump Checker Tool
- Back to testing at the Test line
Symptom checkers
Worried about one infection in particular?
Every anonymous "Do I have…?" checker in one place: a few questions about symptoms, timing, and exposure, scored against CDC criteria, with the right test and window at the end. Not sure where to start? Take the general STD symptom checker instead.
- Do I have chlamydia?
- Do I have gonorrhea?
- Do I have syphilis?
- Do I have HIV?
- Do I have genital herpes?
- Do I have HPV?
- Do I have genital warts?
- Do I have trichomoniasis?
- Do I have hepatitis A?
- Do I have hepatitis B?
- Do I have BV?
- Do I have a UTI?
- Do I have PID?
- Do I have a yeast infection?
- Do I have molluscum contagiosum?
- Do I have scabies?
- Do I have pubic lice (crabs)?
- Do I have mpox?
- Do I have mycoplasma genitalium?
- Do I have NGU (nongonococcal urethritis)?
- Do I have hepatitis C?
- Do I have chancroid?
- Do I have LGV (lymphogranuloma venereum)?
- Do I have granuloma inguinale (donovanosis)?
- Bloodborne exposure: HIV, hep B, or hep C risk?
Why trust these
Built to a public-health standard
The internet is full of "STD risk calculators" that spit out a scary percentage with no source. Ours are different by design. Each tool is a transparent rules engine built directly on published guidance, the CDC's STI guidelines, the USPSTF, and validated screening instruments, not a black box.
Every result is framed as general information with a clear next step, never as a diagnosis, and every tool links to the exact sources it uses and the date it was last reviewed. And because they run on your device, using them tells us nothing about you.
Medically Reviewed & Fact-Checked · Updated
Reviewed by EasySTD Editorial Team
Compiled and checked by EasySTD's editorial team against CDC and public-health sources. This is educational information, not a substitute for advice from a licensed clinician. Our editorial guidelines →
3 Sources
Data & references
- CDC: Sexually Transmitted Infections Treatment Guidelines, 2021https://www.cdc.gov/std/treatment-guidelines/default.htm
- CDC: STI, HIV, PrEP & PEP clinical guidancehttps://www.cdc.gov/sti/index.html
- USPSTF: Published recommendations (STI screening, PrEP)https://www.uspreventiveservicestaskforce.org/uspstf/topic_search_results?topic_status=P
Good to Know
STD tools: frequently asked questions
Privacy, accuracy, and what these tools can and can't do.
Are these STD tools really free?
Yes. Every tool on this page is completely free to use, with no account, sign-up, or payment. EasySTD is an information and comparison directory, the tools are here to help you make informed decisions and find testing.
Is what I enter private?
Yes. Each calculator runs entirely in your browser. Your answers, dates, symptoms, risk factors, are never sent to a server, saved, or shared. Close the tab and they're gone. The one exception is the anonymous partner notifier, which sends a message you write to a contact you choose, without revealing your identity.
Can these tools diagnose me or replace a doctor?
No. These are educational tools grounded in CDC and USPSTF guidance. They give general information and personalized next steps: not a diagnosis, prescription, or medical advice. Only a licensed clinician and a real test can diagnose an STI. Use the results to have a better-informed conversation with a provider.
Where does the medical information come from?
Every tool cites its sources, primarily the U.S. Centers for Disease Control and Prevention (CDC), the U.S. Preventive Services Task Force (USPSTF), and validated published screening instruments. Each page lists its references and shows when it was last reviewed.
Have a different question? Browse the full STD & STI FAQ library, every question we answer, in one place.