Pregnancy Week & Due Date Calculator

Calculate gestational age, due date, and progress instantly from LMP, Ovulation, or Ultrasound.

First day of last menstrual period

Naegele rule: LMP + 280 days (40w 0d).

Enter a date above to see your results.

⚠️ Medical Disclaimer

All calculations are estimates only. Always consult your OB/GYN for accurate gestational age and due date.

Read the Guide or the FAQ.