Menstrual Period Calculator

Everyday Life 17 uses

A free online menstrual period calculator: enter the first day of your last period, your average cycle length and period length to predict your next period, the estimated ovulation day, fertile window and safe periods, with a 6-month forecast table. A handy reference for cycle tracking (not medical advice).

First day of last period

Average cycle length

Period length

Next period

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Estimated ovulation day

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Fertile window

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Safe period

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Forecast for the next 6 months

No.	Period	Ovulation day	Fertile window

Results are based on an average cycle and are for reference only, with no medical diagnostic value. If your cycle is irregular, or for conception or contraception, please consult a doctor.

Menstrual Period Calculator

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