Pregnancy Calculators
Pregnancy Due Date Calculators
Fast, private, no-signup calculators for every common pregnancy dating question. All math runs in your browser — nothing is sent anywhere.
Due Date Calculator
Estimate your due date from LMP, conception, or IVF transfer.
Open calculator →Pregnancy Week Calculator
See exactly how many weeks and days pregnant you are today.
Open calculator →Conception Date Calculator
Work backward from a due date or LMP to estimate conception.
Open calculator →IVF Due Date Calculator
Day-3 and day-5 embryo transfer due date dating.
Open calculator →A trustworthy set of pregnancy dating tools
Every calculator on this site uses the same shared, peer-reviewed obstetric formulas — Naegele's Rule for LMP dating, the 266-day rule for conception dating, and the 261/263-day rules for IVF embryo-transfer dating — so results stay consistent across tools. Calculations run entirely in your browser, your dates never leave your device, and there is no account, signup, or tracking required to use any of them.
Read our short explainer on how due dates are calculated or browse the FAQ for the most common questions about pregnancy dating.