Ovulation Calculator

What's the key to getting pregnant? Know when you're ovulating!

Just enter the first day of your last period and how long your cycle usually lasts, and we'll tell you when you'll likely be most fertile, plus your approximate due dates if you do conceive. First day of your last menstrual period:

Cycle-length in days:

(Default is 28 days. Leave at 28 if you don't know your cycle length.)

NOTE: This tool only provides approximate dates, and cannot predict pregnancy, nor should it be used to avoid pregnancy. If you have really irregular cycles, try monitoring your basal body temperature and cervical mucus to determine when you're ovulating.
Based on what you told us, your most fertile window would be from
If you were to conceive during that time, your due date would be somewhere around
It isn't unusual for pregnancy to take several months, so don't stress! Here are your most likely fertile windows over the next five months, as well as prospective due dates if you do conceive. Have fun (wink, wink), and good luck!!

Fertile Days

Resulting Due Date

Chat with other TTCers on the Trying to Conceive Board Learn more about pregnancy Get preconception advice and information
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