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Pregnancy and baby

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, 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.  

Due Date Calculator

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


If you would like to save your due date, you will need to log in or create an NHS Choices account - you can do this in the box below.

Creating an NHS Choices account will also allow you to write and save your birth plan online.


Log in or create a Choices account if you would like to save your due date.

You can come back and change it as many times as you want.

Page last reviewed: 03/06/2015

Next review due: 03/06/2018


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