Calculate Your Due Date

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expectant moms

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 pregnancy, and want to see what if?

You can calculate your due date from the first day of your last menstrual period, assuming you have a 28-day menstrual cycle (See How Can I Determine When the Baby is Due? in our Health Alert: Planning a Healthy Pregnancy.) Or you can consult an estimated delivery date chart. But if you'd rather not do the math or peer at rows of numbers, then use our Due Date Calculator instead!

To use the calculator, you'll need to know the approximate length of your menstrual cycle, or just use 28 days (the length of most women's menstrual cycles). You'll also need to know either the first day of your last menstrual period, or the day when you most likely conceived.

Just fill out one of the forms below and click Calculate to see your results.

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 :

Back to Expectant Moms Page

Disclaimer: You should NOT use the "due date calculator" as a substitute for medical attention, or for your physician's determination of your estimated delivery date. Be sure to see your doctor as soon as possible if you believe or suspect you are pregnant. You should consider your licensed, qualified physician the best source of pregnancy-related information. A variety of factors can influence the estimate of your due date, and for that reason, the information provided by this calculator should be considered approximate and not necessarily accurate. HealthAtoZ is not responsible for any consequences, and does not guarantee any outcome, from the use of this information.

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