Estimate your pregnancy due date based on the first day of your last menstrual period (LMP) or conception date.
Estimated Due Date:
Gestational Age: weeks
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About Pregnancy Due Dates

A pregnancy due date is an estimate of when a baby is expected to be born. Most pregnancies last about 40 weeks from the first day of the last menstrual period.

How This Calculator Works

If you enter your LMP, the calculator adds 280 days (40 weeks). If you enter a conception date, it adds 266 days. The result is an estimate, not an exact prediction.

Helpful Advice

Only about 5% of babies are born exactly on their due date. Use this estimate as a guide and always consult a healthcare professional for medical advice.

FAQs

Is this accurate? It is an estimate based on averages.
Can due dates change? Yes, ultrasounds may adjust them.
Is this a medical diagnosis? No, it is informational only.