Pregnancy Due Date Calculator

Quick Answer

Estimate your due date based on the first day of your last menstrual period.

Pregnancy Due Date

Last Menstrual Period (LMP)

How This Calculator Works

Estimate your due date based on the first day of your last menstrual period. Uses Naegele's rule: LMP + 280 days. Actual delivery varies by ±2 weeks.

Estimates only. Results are approximate based on standard formulas and current rates. Actual amounts may vary. Use for planning — verify with official sources for exact figures.

Due Date Calculator — Pregnancy Planning

How accurate is the due date calculator?

The calculator gives an estimated due date (EDD). Only about 5% of babies arrive on their exact EDD. Most deliveries occur within ±2 weeks of the estimate. Regular ultrasound scans provide more precise dating.