Pregnancy Due Date Calculator

Estimate your due date and track key pregnancy milestones

Calculation Method

First Day of Last Menstrual Period

Average Cycle Length: 28 days

21 days35 days

Results

Enter your information and click Calculate

About This Calculator

Due dates are estimates. The LMP method uses Naegele's rule (LMP + 280 days) adjusted for cycle length. The conception method adds 266 days. IVF dates are calculated from embryo age at transfer. Only about 5% of babies are born on their exact due date — most arrive within two weeks before or after. Always confirm with your healthcare provider.