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Due Date Calculator
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Due Date Calculator

Now that you know you're pregnant (or have a pretty strong suspicion), it's time to answer one of the biggest questions on your mind: When is your baby due? Or perhaps you're just thinking about having a baby.

To use the calculator, you'll need to know the approximate length of your menstrual cycle. If you don't, just use the average 28 days. You'll also need to know the first day of your last period. Click here to see how the calculator works.

Fill out the form below and click "Calculate" to see your results. You will also be shown your baby's development for this week of your pregnancy, and you can click on other weeks to see how your baby will grow.

Use the first day of my last menstrual period to calculate my due date.
The length of my menstrual cycle is:

The first day of my last menstrual period was:

Use the probable date of conception to calculate my due date.
The length of my menstrual cycle is:

My baby's probable date of conception is:

This tool was reviewed and updated June 2007.

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