Etoolio

Due Date Calculator

Free pregnancy due date calculator. Estimate your delivery date from your last menstrual period, current trimester and how many weeks pregnant you are.

Good to know

Due Date Calculator — frequently asked questions

How is a due date calculated?

The standard method (Naegele's rule) adds 280 days (40 weeks) to the first day of your last menstrual period. Etoolio applies this and shows your estimated delivery date and current week.