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 select 'show your due date'. Pregnancy normally lasts from 37 weeks to 42 weeks from the first day of your last period.
You need to know the first day of your last period to use this calculator. If you do not know it or are unsure, speak to a midwife or GP.
As part of your pregnancy (antenatal) care, your midwife will offer you a 12-week scan that may give you a more accurate date for the birth of your baby.
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
Sign up for Start4Life's pregnancy and baby emails for expert advice, videos and tips on pregnancy, birth and beyond.
You can find pregnancy and baby apps and tools in the NHS apps library.
Unplanned or unsure? Find out Sexwise has more information and support.