How accurate are due dates?

Only about 5% of babies arrive exactly on the due date. Think of it as the midpoint of a several-week window.

Can I adjust for cycle length?

Yes—longer or shorter cycles shift ovulation timing. Enter your average length so the estimate reflects your body.

Estimate due dates using LMP, conception, ultrasound, or IVF transfer details with trimester milestones.

Calculate your pregnancy due date and track milestones using LMP, conception date, or IVF transfer date

Calculation Method

First Day of Last Period (LMP)

Enter the first day of your last menstrual period

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Enter your date above to calculate your due date