Loona Calculators
Enter the first day of your last menstrual period (LMP) to find your expected due date, which week of pregnancy you are in, and your current trimester.
By Naegele's rule: LMP + 280 days (40 weeks), assuming a regular 28-day cycle.
Only about 1 in 20 babies arrive exactly on the due date — it is an estimate. Your doctor's ultrasound dates can be more accurate.
Due dates shift a little with cycle length. Confirm with your gynecologist.