Pregnancy Week Tracker

Enter the first day of your last period to find your pregnancy week, trimester, and due date.

First day of last period

Enter the date above.

Informational estimate only, not medical advice.

How to use

Enter the first day of your last period to see week, trimester, and due date.

How is pregnancy week calculated?

From the first day of the last menstrual period (LMP). Week 1-12 is the first trimester, 13-26 the second, 27-40 the third.

Is this a medical tool?

No — it is an informational estimate. Confirm with your doctor or midwife. Not medical advice.

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