Pregnancy Due Date Calculator
Estimated due date from the first day of your last period.
How it works
Naegele's rule: due date = first day of last period + 280 days. Only a doctor can confirm a due date.
FAQ
Is this calculator free?
Yes. No signup is needed and nothing you enter is stored.
Is the result exact?
Results are rounded for display. For financial, medical, or legal decisions, confirm with a professional.
Do my numbers leave my device?
No. The calculation runs in your browser.