Pregnancy Due Date Calculator
Estimate your due date from your last menstrual period (Naegele’s rule).
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Estimated due date
2024-10-07
Estimate via Naegele’s rule (LMP + 280 days). Consult your doctor.
How it works
Enter the first day of your last menstrual period to estimate your due date.
Frequently asked questions
- How is the due date estimated?
- Naegele’s rule: 280 days (40 weeks) from the first day of your last period.
- Is this accurate?
- It’s an estimate; only about 1 in 20 babies arrive exactly on the due date. Your doctor’s scan dating is more precise.
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