Pregnancy Due Date 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
Remember back. When was the first day of your last menstrual period?

What are the 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.

The information contained on this site is for here for educational purposes only and is not meant for diagnosis or treatment or be considered as medical advice. Any information that is found within this site should be discussed with a health care professional. Use of this website and information found whitin should be done in accordance with the health care plan outlined by your health care professional. For specific medical advice, and treatment, please consult your doctor.