Ovulation Calculator

Health & Pregnancy

What is the first day of your last period?

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About

Your menstrual cycle can vary from month to month, and not everyone's is the same length. Use this calculator to see when you may be ovulating to find your most fertile days. Typically, you can get pregnant during about 6 days each month. That's called your fertility window.

This ovulation calculator is not a guarantee of pregnancy or of birth control. The calculator and information on this website are not medical advice. Talk to your doctor or nurse to plan for pregnancy and find birth control that works for you.

Here are signs of ovulation: Rise in basal body temperature, cervical mucus is the texture of egg whites, breast tenderness, mild cramps or twinges in the abdomen, very mild spotting, heightened sense of smell, increased sex drive, changes in appetite or mood and bloating. Check whether you are in these situations or not, go to seek doctor's help if you have further questions.

Ovulation usually lasts from 12 to 24 hours. If the egg isn't fertilized in this time, it disintegrates. But a woman's fertile window lasts 6 days, because sperm can live in your body for up to five days. You can become pregnant if you have sex anywhere from five days before you ovulate until a day after it.

    If you're unsure about the test results: Wait a few days and take another test/consider using a more sensitive test that can detect lower levels of hCG in the urine/a blood test can provide a more accurate result. It’s also a good idea to discuss your situation with a professional, especially if you have irregular periods or other health concerns.
    If you find yourself pregnant: Congratulations! It is suggested to visit a healthcare provider to get a confirmation of your pregnancy through a blood test and possibly an ultrasound. Depending on your personal, medical, and financial circumstances, consider what you want to do next. If you plan to continue the pregnancy, start discussing with your healthcare provider about necessary lifestyle changes and prenatal vitamins.