Pregnancy Tools

How to use the Pregnancy Calculator

Enter the date of your last menstrual period and the number of days in your menstrual cycle into the pregnancy calculator, and click on the Calculate button. Other calculations are optional – use them when needed. On average, there are 28 days in a menstrual cycle, but it can last from as little as 22 to as many as 44 days. The Pregnancy Calculator takes your menstrual cycle into account when calculating the due date and the conception date.

When was the first day of your last menstrual period?
Number of days in your menstrual cycle

Likely conception date:
End of first trimester (12 weeks):
End of second trimester (27 weeks):
Your due date is (40 weeks):
(1) Fetal age (from the conception date):
(2) How far along you are in your pregnancy:

 

How many weeks will you be pregnant on a given date?

Number of weeks you will be pregnant for:

 

On which date will you be pregnant for the given number of weeks?
The number of weeks:

Calculated date:

 

Given the birthday or due date, calculate likely conception date

Calculated conception date:

 

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