How to Calculate Your Pregnancy Due Date

One important tool to calculate the due date is the BabyMed due date calculator, in which you can enter the first day of your last menstrual cycle and other information. A close date will also work as well, if you do not know the exact date. The due date calculator will display the estimated date of ovulation and the expected due date of your baby. This estimate is based on the last menstrual period and the estimated date of conception.

Your pregnancy due date is calculated by adding 40 weeks (280 days) to the approximate first day of your last menstrual period or 266 days to the day of ovulation.

Only 5% of women deliver their babies on their projected due date, so this date is just an estimate and delivery usually happens within 2 weeks before or after the due date.

Do you know your due date but want to know exactly when you did get pregnant? Try our Reverse Due Date Conception Calendar and Calculator. There, you can enter your due date and we will calculate the exact days of conception. More importantly, we will provide the range of dates that you may have made love and got pregnant.

Our pregnancy due date calculator will calculate your due date based on your own data. The due date is calculated first by calculating your date of ovulation and fertilization (14 days prior to your next estimated period), and then by adding 266 days to that date.

Just enter the first day of your last menstrual period plus the average length of the menstrual cycle and we will calcuate the due date for you.