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Pregnancy Due Date Calculator

Use our simple pregnancy due date calculator to estimate the date of your baby's arrival. Enter your information below to find out approximately when you will give birth.

When you find out you're pregnant, one of the first things you'll probably wonder is 'when will my baby be born?'. Our due date calculator will give you an approximate date for the arrival of your baby.

Your pregnancy due date is calculated from the first day of your last period, and it's assumed you conceived halfway between periods. If you conceived earlier or later in your cycle then this will probably effect your due date.

To give you a more accurate baby due date, your midwife will offer you a dating scan as part of your antenatal care

So if you're ready to estimate your due date, select the date of the first day of your last period and the normal length of your period in our pregnancy calculator, then click on Calculate.  

What next?

Now's the ideal time to sign up for our free Pregnancy & Baby newsletter. Our weekly email update delivers expert information about what to expect when, your baby's development and your health and well-being, right to your in-box.

Questions answered

No two pregnancies are exactly the same - the average is between 37 and 42 weeks long, with important changes every week. Naturally you've got lots of questions. Take a look at our information on being pregnant, where you will find essential, evidenced-based information designed to help you make the best decisions for you and your baby.

And don't forget that NCT's free helpline offers practical and emotional support in all areas of being pregnant, birth and early parenthood: 0300 330 0700. We also offer antenatal courses which are a great way to find out more about birth, labour and life with a new baby - and make new friends along the way.

Page last updated: 6 September 2016