Pregnancy due date calculator

Are you not sure how many weeks pregnant you are or when your pregnancy due date is? This is one of the most common things our patients say "I am not sure how many weeks I am", that is why we have listened and have created our easy to use pregnancy calculator.

The calculator on this page can help you work out an estimate of not only when your baby will be due, but also how many weeks pregnant you currently are and the likely date of conception. Typical pregnancies last from between 37 weeks to 42 weeks from the first day of your last period with a regular cycle period of 28 days.

To find out your due date and other useful information, use the drop down menus below to enter the date of the first day of your last period, and choose cycle period (leave at 28 days if your cycle is regular , or enter the number of days typically in your cycle) and click on the 'calculate due date' button and we will do the rest.

To find out more about how the calculator works and about your pregnancy dates/stages then click here or the image below to read more in an article by our senior consultant practitioner.

Please bear in mind the purpose of the calculator is to assist you in providing an estimate of your due date and other information based on the last period date you enter and these dates may change as your pregnancy progresses and you have ultrasound scans, etc. If you are unsure of this or any other information please discuss with your midwife or health care professional.