pregnancy

Due date calculator

If you’ve just found out you’re pregnant one of the first question you’ll probably ask is when your little one will arrive. Our due date calculator is a simple tool which helps you work out your approximate due date before you get a more definite answer at your dating scan, which happens when you are around 12 weeks pregnant.

How does the due date calculator work?

The way due dates are calculated can be a little confusing. Until your dating scan your pregnancy will be counted from the first day of your LMP (last menstrual period), although ovulation will generally occur two weeks after your LMP, which is when you technically become pregnant. In simple terms, your due day is the first day of your last period, plus 40 weeks.

Is the due date calculator accurate?

Only 5% of pregnancies arrive on their due date with the majority born two weeks either side, but having a better idea of the due date is a good way to ensure you have everything in place in time for your new arrival.

What should I do once I know my due date?

Once you’ve used the due date calculator, take a look at the pregnancy week by week section to find out how you and your baby will develop throughout your pregnancy. Chances are if you’ve just discovered you’re pregnant you’ll already be 4 weeks or even 6 weeks pregnant.

Due date calculator

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