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