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Congratulations, you're pregnant!
Our 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?
Calculate your baby's due date
When was the first day of your last period?
What's the length of your cycle?
Calculate your due date
Your due date is8 april 2018
You are in week
Free online tools
Practical tools, from our Due Date Calculator to our handy Baby Symptom Checker
How is my pregnancy due date calculated?
Unless you’ve been keeping track of when you ovulate, it’s impossible to work out when you conceived, and therefore, when your baby will arrive. That’s why we use the date of your last period and the average length of your menstruation cycle to calculate your 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. While it’s unlikely your baby will arrive on this exact date, most babies arrive within a week of their due date.
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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.
Your pregnancy week by week
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.