Your pregnancy and baby guide

Pregnancy 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, enter the date of the first day of your last period, and click 'show due date' - the calculator will do the rest.

For information and advice you can trust, sign up for weekly Start4Life pregnancy and baby emails.

When was the first day of your last period?

For example 15 / 9 / 2017

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

Page last reviewed: 03/06/2015
Next review due: 03/06/2018