When was the first day of your last period?
Using the due date calculator
To calculate your estimated due date (EDD), input the date of the first day of your last period and select “Show Your Estimated Due Date.” A typical pregnancy lasts between 37 to 42 weeks from that date.
It’s essential to know the first day of your last period to use this calculator. If you’re unsure or cannot recall it, please consult a midwife or your GP.
During your antenatal care, your midwife will provide you with a 12-week scan, which can give a more precise estimate of how far along you are in your pregnancy.
