Pregnancy Calculator
Calculate your due date, current pregnancy week, and trimester from your last menstrual period.
First day of your last period
About Pregnancy Calculator
The Pregnancy Calculator estimates your due date (EDD), current gestational age, and trimester based on the first day of your Last Menstrual Period (LMP). It also shows estimated conception date and upcoming pregnancy milestones from weeks 4 through 40.
How to Use
Enter the first day of your last menstrual period and your average cycle length (default 28 days). Click Calculate to see your estimated due date, current pregnancy week, trimester, and key milestones throughout your pregnancy.
Common Use Cases
- Estimating your baby's due date from LMP
- Tracking current pregnancy week and trimester
- Planning prenatal appointments around key milestones
- Sharing your due date and pregnancy progress with family