Pregnancy Due Date Calculator

Estimate your due date and current stage of pregnancy.

Calculate based on

First day of last period

Enter a date to estimate your due date.

How it's calculated

The most common method (Naegele's rule) adds 280 days to the first day of the last menstrual period. Conception-based and IVF estimates adjust for the typical 14-day gap between LMP and conception. This is an estimate — only about 5% of babies arrive on their exact due date.