Track your journey. Calculate the Estimated Due Date (EDD) and discover which gestational week you are in with the precision of Naegele's Rule.
Enter the date of your last period to generate your gestational schedule.
| End of 1st Trimester (13 wks) | -- |
| Fetal Viability (24 wks) | -- |
| End of 2nd Trimester (27 wks) | -- |
| Full Term (39 wks) | -- |
Most pregnancies last about 40 weeks (or 280 days) from the first day of the last menstrual period. Our calculator uses Naegele's Rule, the worldwide standard adopted by obstetricians, but with an important difference: adjustment for your menstrual cycle.
The standard rule assumes a 28-day cycle with ovulation on the 14th day. If your cycle is shorter or longer, ovulation occurs at a different time, which alters the actual date of conception and, consequently, the due date.