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Pregnancy Due Date Calculator

Congratulations! You’re pregnant. The calculator on this page can help you work out when you might expect your baby to arrive. This will give you a rough idea. As part of your antenatal care, your midwife will also offer you a dating scan that will give you a more accurate date for the birth of your baby.

Pregnancy normally lasts from 37 weeks to 42 weeks from the first day of your last period. To find your due date, use the drop down menus below to enter the date of the first day of your last period, and click 'calculate' - the calculator will do the rest.

From first day of your period to the first day of your next period. Ranges from: 22 to 44. Leave 28 if unsure.