Pregnancy Calculator

Use the Pregnancy Calculator to:

Determine the due date
Calculate the likely conception date
Calculate the end of the first and second trimesters
Find out for how many weeks have you been pregnant
Calculate how many weeks you will be pregnant on a given date
Calculate on which date you will be pregnant the specified number of weeks, and
Determine the likely conception date when you know the birthday or due date.

Pregnancy Calculator
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):
Number of weeks you have been pregnant for:
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:

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.

Also, the Pregnancy Calculator needs the number of days in your menstrual cycle when calculating the likely conception date from the given birthday or the due date.

Now that you know your due date, why not send out a FREE eCard anouncing the news! Click Here to start! Great pictures, music, multiple recipients, just check it out! Just another great freebie brought to you by Baby Manor!

Legal Notice: The BabyManor.com Pregnancy Calculator is for novelty and fun! While the calculation is based on good approximate gestation periods for humans, it is not intended to be used for any authoritative or legal purpose. So have fun with it but don't base anyone's paternity on it for goodness sakes!