The Ovulation Calculator estimates your fertile window and ovulation day from the first day of your last period and your average cycle length. It maps out your most fertile days and the next few cycles to help with planning.
Finding your fertile window
Ovulation typically occurs about 14 days before your next period. The days leading up to and including ovulation — your fertile window — are when conception is most likely. This calculator estimates that window from your cycle.
It also projects the next three cycles so you can plan ahead.
Please note
- Cycles vary from person to person and month to month
- Not a reliable contraception method
- For conception or family planning, consult a professional
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