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Ovulation Calculator

Track your ovulation and fertile window for conception or contraception planning

Last Period First Day

Average Cycle Length

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Usually 21-35 days

Average Period Duration

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Usually 3-7 days

How Does Our Ovulation Calculator Work?

Our calculator uses the standard 14-day rule: ovulation typically occurs 14 days before your next period, regardless of cycle length.

Get your fertile window (5 days before to 1 day after ovulation) and plan accordingly for conception or family planning.