Pregnancy Guide
NHS Choices

Due date calculator

The calculator on this page can help you work out when you might expect your baby to arrive. This will give you a rough idea. As part of your antenatal care, your midwife will also offer you a dating scan that will give you a more accurate date for the birth of your baby.

Pregnancy normally lasts from 37 weeks to 42 weeks from the first day of your last period. To find your due date, use the drop down menus below to enter the date of the first day of your last period, and click 'calculate date' - the calculator will do the rest.

Last Updated: 08/11/2017 13:17:16
What was the date of the first day of your last period?

Some women's cycles are not exactly 28 days. If your cycle is shorter or longer than 28 days, please adjust the number below.