Pregnancy Calculator

Estimate due date, gestational age, and trimester from last menstrual period and cycle length.

Last menstrual period (LMP)

As of date

Cycle length (days)

Enter LMP and cycle length to see results.

This tool provides an estimate. Confirm with a healthcare professional.

Frequently Asked Questions

We start from LMP + 280 days and adjust by cycle length.

This is an estimate and may differ from clinical measurements.