Due Date Calculator | Pregnancy

Follow your Surrogates Pregnancy Progress

Share this on

The pregnancy due date is an estimate of when the woman will deliver the baby. It can be calculated by using the formula below; taking the first day of your last menstrual period (LMP), adding 7 days, and then counting backward 3 months.

How Can I Figure out the Pregnancy Due Date?

LMP (first day of Last Menstrual Period) + 7 Days = Total 1
Total 1 – 3 Months = Due Date

For Example - If the first day of your LMP was August 20th:

August 20th + 7 Days = August 27

August 27th – 30 Days = May 27th

The due date is ONLY an estimated delivery date. Most women do not give birth on time, but typically within 1 week before or after the estimated due date. To learn more about the delivery see our labor and delivery section.