Pregnancy due date calculator
The calculator on this page can help you work out when you might expect your baby to arrive.
Using the due date calculator
To find your due date, enter the date of the first day of your last period, and click 'show your due date' - the calculator will do the rest. Pregnancy normally lasts from 37 weeks to 42 weeks from the first day of your last period.
Find out about:
- your NHS pregnancy journey
- your first midwife appointment
- health things you should know when you're pregnant
Find out about what's happening when you're:
- 1, 2 or 3 weeks pregnant
- 4 weeks pregnant
- 5 weeks pregnant
- 6 weeks pregnant
- 7 weeks pregnant
- 8 weeks pregnant
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You can find pregnancy and baby apps and tools in the NHS apps library.
Unplanned or unsure? Find out more information and support.
Page last reviewed: 10 April 2018
Next review due: 10 April 2021