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Pregnancy calculator
Calculate your due date and see which week of pregnancy you are in.
Due date
December 21, 2026
Current status
0. week + 1 days
Pregnancy calculator and due date
Most pregnancies last 40 weeks (280 days) from the first day of the last period. The due date is indicative—babies can be born up to two weeks earlier or later.
How is the due date calculated?
Doctors often use Naegele’s rule: add 7 days to the first day of the last period, subtract 3 months, then add 1 year.
Start of maternity leave
Maternity leave (PPM) typically starts 6 to 8 weeks before the expected due date. The exact date is determined by your gynecologist.
Frequently asked questions
What does the calculator use to estimate the due date?
It uses the first day of the last period and the standard pregnancy length.
How accurate is the result?
It is an indicative estimate. The real due date may differ by days or weeks.
Can I use the result for medical decisions?
No, always follow your doctor’s recommendations for medical decisions.