Looks like you’re in the USA or Canada. Visit our US site Mom365 to search baby names, get offers and to connect with local Moms.

Take me there No thanks, I’ll stay here

Join Bounty for free today

For weekly personalised pregnancy and parenting emails, and lots more…

Why should you join Bounty? Here's why:

  • Four free packs full of goodies
  • Four free guides full of expert advice
  • Exclusive and personalised offers - save up to 70%!
  • Member only competitions 

Pregnancy due date calculator

Calculate the due date of your baby

If you’ve just found out you’re pregnant one of the first questions you’ll probably ask is when your little one will arrive. Our pregnancy 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 pregnancy due date calculator work?

Working out how many weeks pregnant you are 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 pregnancy 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 pregnancy 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.

Found this helpful? Read more on early pregnancy:

Pregnancy Products

Great offers for you

Show all products

£5 Off

Alpha - Natural Highchair from George!

£50 £44.99 Offer ends 1 Oct 2017
36% Off

Babymoov Nutribaby 5-in-1 Food Processor

£109.99 £69.95 Offer ends 1 Oct 2017
£5 Off

Safari Stripe Booster Seat

£24.99 £19.99 Offer ends 1 Oct 2017