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    What Is This Tool?

    The Ovulation Calculator predicts your ovulation day, fertile window and next period from your cycle.

    Privacy and Security

    The numbers you enter in the Ovulation Calculator (first day of last period, average cycle length and so on) are calculated in your browser. They are not sent to or saved on Adobe IQ servers, and they disappear when you close the page.

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    How to use this tool

    • Enter your first day of last period and average cycle length.
    • Fill in the remaining fields of the Ovulation Calculator.
    • Read your estimated ovulation day and fertile window starts instantly.

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    All Calculators

    Ovulation Calculator

    Ovulation usually happens about 14 days before the next period. Cycles vary, so treat these as estimates.

    Result

    Estimated ovulation day
    —
    Fertile window starts
    —
    Fertile window ends
    —
    Next period expected
    —