Online Calculators by CalcNexus
Online Calculators by CalcNexus

Ovulation Calculator

Estimate your ovulation date.
Enter the date of the first day of your last menstrual period, and your average cycle length.
Cycle Length:

How To Calculate Your Ovulation Date

Your ovulation date is normally 14 days before the start of your next period. If you have a regular menstrual cycle, you start with the first day of your last period and add the number of days in your average cycle and then subtract 14. This calculator also estimates the dates for the range of fertility, based on subtracting 3 days and adding 1 day to the ovulation date.

References and Resources

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Disclaimer: This ovulation calculator only provides an estimate and does not constitute medical advice. You should consult your doctor. Please do not use this calculator to plan when NOT to get pregnant.