How to Calculate Pregnancy Due Date?

Did you know that only 5% of women give birth on the expected date? Yes, that’s right. Most babies arrive within 37-41 weeks of pregnancy. This means predicting your due date accurately can be a difficult task. Your doctor may have given you an official due date during your first prenatal visit. However, these due dates are just estimates and not exact predictions. 

So, how do you calculate your exact due date? This involves utilizing several procedures that we will discuss in detail.

Ways to Calculate Your Pregnancy Due Date

Most pregnancies last for around 40 weeks. Your due date is usually calculated by adding 280 days from the first day of your last menstruation cycle. Here are some methods through which you can learn how to calculate your due date: 

• Use a Pregnancy Calculator

A pregnancy due date calculator is one of the most efficient ways to check your due date. There are several platforms online that provide you with this calculator. So, all you need to do is visit the official website of the pregnancy calculator provider, select the first day of your last period and then the usual number of days in your period. The calculator will then give you an estimated due date of your baby’s birth.

• Human Gestation Formula

This is a simple formula that involves calculating in the following way:

[First Day of Last Period] + 280 days = Due Date Based on Last Period 

For example, if your last menstrual period began on June 20, your estimated due date for child birth would be March 24, 280 days later.

• Naegele’s Rule Formula

This is yet another simple yet effective rule to calculate your pregnancy due date. All you need to do is count back three months from the first day of your last period and then add 7 days to it. So, the formula goes like this:

For example, your estimated due date would be May 13 if your last menstrual period began on August 6.

• Conception Formula

You can count 38-40 weeks out to calculate the baby's due date if you know your date of conception. This also involves following another formula which is:

[Date of Conception or Fertilization] + 38 to 40 weeks = Due Date Based on Conception Date

For example, your due date would be around July 8 to July 22 if you conceived on October 15.

Final Thoughts

Calculating a pregnancy due date is not baffling unless you know the correct methods to do it. We have already discussed some of the efficient methods to calculate the same. However, the most effective one among them is a pregnancy due date calculator.

With several pregnancy calculators available online, you may be confused regarding which platform to choose for the calculation. We recommend Cryoviva, where you can access the pregnancy calculator to know the estimated date. You can also learn about other advanced stem cell preservation techniques to secure the future of your child through this platform.