Health · Free tool
Pregnancy Due Date Calculator
Enter your last menstrual period (LMP) to estimate due date, current weeks pregnant, trimester and major milestones. Uses Naegele's rule (LMP + 280 days).
🔒 Runs entirely in your browser — no data sent to any server.
For educational use only
Naegele's rule assumes a 28-day cycle and ovulation on day 14. Your actual due date may shift by a week or more depending on cycle length and ultrasound dating. Always confirm your due date with an obstetrician.