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Pregnancy Due Date Calculator

Congratulations! You’re pregnant. This calculator gives a rough idea when your baby may arrive. As part of your antenatal care, your midwife will offer a dating scan that will give you a more accurate date for the birth of your baby.

Pregnancy normally lasts from 37 to 42 weeks from the first day of your last period. To find your due date, 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.