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Due Date (pregnancy)

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Due Date Calculator estimates the expected delivery date (EDD) by adding 280 days (40 weeks) to the first day of the last menstrual period (LMP) using Naegele's rule — the standard method used by most healthcare providers. Shows the estimated due date, current gestational week, and trimester boundaries. This is an estimate; consult a healthcare provider for medical guidance. Runs in your browser.

Related: DaysDateAge

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Naegele's rule: EDD = LMP + 280 days (40 weeks)

Estimated Due Date

Saturday, February 13, 2027

239 days remaining

Gestational age

5w 6d

Weeks + days

Trimester

1st Trimester

Progress

15%

of 40-week pregnancy

Days pregnant

41 days

Week 0Week 40

This is an estimate. Only ~5% of babies arrive on their exact due date. Consult a healthcare provider for medical guidance.

Pregnancy due date calculator

Estimates the expected due date from the last menstrual period (LMP) using Naegele's rule: LMP + 280 days (40 weeks). Also shows the current gestational week. Note: this is an estimate — actual due dates are confirmed by ultrasound measurement.