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      Due date calculator

      37 Weeks Pregnant

      Due date calculator

      Read time: 2 minutes

      How many weeks pregnant am I?

      Our pregnancy due date calculator will help you to work out when your baby’s likely to arrive, so you can start planning ahead. Most babies arrive within a week of their due date.

      Calculate your pregnancy week

      What's your due date?

      Date (yyyy-mm-dd) should be within the upcoming 40 weeks
      I don't know my due date

      Calculate your baby's due date

      When was the first day of your last period?

      Make sure the date you entered is within the last 9 months.

      What's the average length of your menstruation cycle?

      Calculate your due date

      Your due date is

      8 april 2018

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      How to calculate your due date

      Unless you've been keeping track of when you ovulate, it’s hard to work out when you conceived, and therefore, when your baby will arrive. Our due date calculator uses the date of your last period and the average length of your menstruation cycle to calculate your due date.

      How accurate are due dates?

      While due dates give you a good idea of when your baby may arrive, it’s unlikely your baby will be born on this exact date. In fact, only 4% of babies arrive on their due date1 – most babies arrive within a week of their due date.

      Will my due date change when I have a scan?

      You’ll get a more accurate due date once you have your dating scan.


      Calculating Your Due Date

      Powered by Nutricia

      Ovulation and conception usually occur about two weeks after the first day of your period, and the average pregnancy lasts between 37 weeks and 42 weeks. Using this information, along with the average length of your menstruation cycle, we are able to calculate your estimated due date.


      1. Jukic AM et al. Length of human pregnancy and contributors to its natural variation. Hum Reprod. 2013 Oct; 28(10): 2848–2855.

      Free online tools

      Practical tools, from our Due Date Calculator to our handy Baby Symptom Checker

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      Your baby's future health begins here

      Your baby's future health begins here

      At Aptaclub, we believe that experience helps to build resilience; that each new encounter, whether in pregnancy or after birth, can shape your baby’s future development. With our scientific expertise and one-to-one round the clock support, we can help you and your baby embrace tomorrow.

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      Questions about feeding and nutrition?

      Our midwives, nutritionists and feeding advisors are always on hand to talk about feeding your baby. So if you have a question, just get in touch.