Pregnancy Due Date Calculator

This tool works out babies due date for you! To calculate your due date, enter the date of your last period in the top box and click 'calculate' and we'll predict the due date of your baby, along with your trimester dates and the estimated date of conception.

Alternatively, if you already know your baby due date, you can enter this and 'calculate backwards' to give you more information.

First day of your last period

(Day of the week is optional)

Estimated date of conception:
Your First Trimester ends: (12 weeks)
Your Second Trimester ends: (27 weeks)

Estimated due date