Due Date Calculator
This due date calculator works from the first day of your last period and your cycle duration
If you have a problem using the pregnancy due date calculator, please contact us. For info on how the due date is calculated, view our pregnancy due date calculator info.
Please fill in the details below, to calculate your pregnancy due date.
Remember that the normal range of time between conception and birth can vary from 38 weeks to 42 weeks, depending on your menstrual cycle and the date of your last period. This calculator uses the method used by doctors, where the due date is 280 days from the first day of your last period. Pregnancy ultrasound scanning can provide a more accurate determination of your baby’s due date, so ask your doctor when you have your first ultrasound.