Pregnancy calculators by amma
Free, evidence-based tools for your cycle and your pregnancy: your next period, your fertile days, when to take a pregnancy test, your due date, weeks to months and beta hCG.
Due date calculator
By LMP or conception
Weeks to months
Weeks ↔ months
Ovulation calculator
Fertile window
hCG calculator
Doubling time & rise
Period calculator
Next periods & days late
When to take a pregnancy test
The most reliable test day
About these calculators
The pregnancy calculators use standard obstetric conventions: 40 weeks of gestation counted from the first day of your last menstrual period (Naegele's rule). Results are estimates — always confirm with your healthcare provider.
Medical Disclaimer
This tool is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or qualified health provider with any questions you may have regarding a medical condition.
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