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Tools & Calculators

Free, private, clinically-grounded calculators and checkers. Every one runs entirely in your browser: nothing you enter is sent, saved, or shared. Choose your area to get started.

100% private CDC, ACOG & USPSTF sources No sign-up

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Four suites, one standard

Every tool is a transparent rules engine built on published guidance, never a black box, and runs on your device so using it tells us nothing about you.

Sexual health

STD & Sexual Health Tools

Prevention, testing and after-a-result: PrEP and DoxyPEP calculators, a test-window timer, a results interpreter, per-condition symptom checkers, partner tools, and STD-rate lookups.

PrEP & PEPTest windowsSymptom checkersResults readers
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Fertility

Fertility Tools & Calculators

25 tools for tracking your cycle, reading a semen analysis, and planning a fertility evaluation or IVF/IUI cycle. ASRM and ACOG grounded.

OvulationCycle trackingSemen analysisIVF/IUI
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Pregnancy

Pregnancy Tools & Calculators

61 tools for testing, reading the result, dating, week-by-week tracking, health and safety, and labor & birth. ACOG, CDC, and FDA grounded.

Due dateTest timingWeek by weekSafety lookups
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Postpartum & Newborn

Postpartum & Newborn Tools

21 tools for the fourth trimester and your baby's first weeks — recovery, mood, feeding, jaundice, and more. ACOG, AAP, and CDC grounded.

RecoveryMood screeningFeedingNewborn checkers
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Why trust these

Built to a public-health standard

Most online "health calculators" hand you a number with no source. Ours are different by design: each is built directly on published guidance, the CDC, ACOG, the USPSTF, and validated screening instruments.

Every result is framed as general information with a clear next step, never a diagnosis, and every tool cites its exact sources and shows when it was last reviewed. Because they run on your device, nothing you enter is sent, saved, or shared.

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