Pregnancy Calculator
Use this calculator to:
- Find out how many weeks you have been pregnant
- Calculate the likely conception date
- Calculate the end of the first trimester
- Determine the due 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.
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.
Disclaimer:
The Pregnancy Calculator above is an estimation of weeks from reported last normal menstrual period and does not constitute medical advice. A missed period does not necessarily mean that you are pregnant, and having a period does not mean you are not pregnant. Only an exam, pregnancy test, blood test and or ultrasound by a physician can confirm pregnancy and approximate length of pregnancy. The calculator should be used as a guide only and should not be relied upon for weeks of pregnancy, conception date, or due date.