Health & Fitness Calculators
Pregnancy Due Date Calculator
Enter the first day of your last menstrual period to estimate your due date and current gestational age.
Uses Naegele's rule (LMP + 280 days) — a standard estimate assuming a 28-day cycle. Your care provider's estimate, especially after an ultrasound, is more accurate.
How to use this tool
- 1Enter the first day of your last menstrual period.
- 2See your estimated due date.
- 3See your current week and day of pregnancy.
Frequently asked questions
How accurate is this estimate?+
It uses Naegele's rule (LMP + 280 days), a standard estimate assuming a typical 28-day cycle — an ultrasound-based estimate from your care provider is generally more accurate, especially for irregular cycles.