Pregnancy Calculator, Baby Due Date Calculator, Calculate Due Date

Pregnancy normally lasts around 40 weeks from the first day of your last menstrual period. Confused already? Forget complicated charts - try our handy due date calculator to help you work out when you can expect your baby to arrive.

Just enter the first day of your last period and we’ll estimate your baby’s due date. Some women have menstrual cycles that are not exactly 28 days though, so if your cycle is longer or shorter than 28 days, please adjust the number as required.

Please remember that this is just an estimate and that the majority of women do not give birth on their due date.