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Pregnancy week calculator
Convert an established due date into pregnancy weeks and days on a chosen date.
Source-linked preview · Independent clinical and translation review pending.
Entries stay on this device. Nothing is saved automatically; CSV export is your choice.
Your result
Enter your details to see a result and its reference.
THE LITTLE DETAILS
Made for your everyday.
Gestational age counts from 280 days before the due date. This is calendar arithmetic and does not diagnose pregnancy, viability or labour.
ACOG ↗Sources checked November 8, 2026. Source links do not imply endorsement.
Three small steps
- Choose dates, units and the applicable reference.
- Enter accurate details; read the conditions before calculating.
- Read the result, method and original sources together.
How should I interpret this result?
Gestational age counts from 280 days before the due date. This is calendar arithmetic and does not diagnose pregnancy, viability or labour.