Pregnancy Due Date Calculator
Congratulations! Use our private, browser-based tool to find your estimated due date and track your trimester milestones.
Privacy Note
All date calculations happen locally in your browser. We never store or track your personal health data.
Understanding Your Due Date
An Estimated Due Date (EDD) is exactly that—an estimate. Only about 4% of babies are actually born on their due date. However, calculating it helps your healthcare provider monitor your baby's development.
How It's Calculated:
Most calculators, including this one, use Naegele's Rule. This assumes a standard gestation period of 280 days (40 weeks) from the first day of your last menstrual period (LMP).
- LMP Method: Adds 280 days to the first day of your last period. This is the standard used by doctors.
- Conception Method: Adds 266 days to the date of conception. This is used if you know exactly when you conceived.
Privacy That Matters:
Zero Tracking
On-device processing means we never see your dates. No pregnancy data is sent to our servers or sold to advertisers.
No Account Needed
Use the calculator as many times as you want without logging in or providing an email address.