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WOMEN'S HEALTHCARE • MANSA

Ovulation Calculator

Estimate your fertile window and expected ovulation date using your last menstrual period and usual cycle length.

Enter the first day of your most recent menstrual period.
Usually between 21 and 45 days.

Your cycle estimate

Based on the information you entered.

Estimated ovulation
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Estimated ovulation day
Fertile window
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Highest fertility is around ovulation.
Next period
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Estimated start of next period

Your estimated fertile days

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What is the fertile window?

The fertile window is the period around ovulation when pregnancy is possible. Sperm can remain viable for several days, while an egg remains viable for roughly 24 hours after ovulation.

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Want personalised guidance?

If your periods are very irregular, you are having difficulty conceiving, or you have questions about your reproductive health, speak with a qualified gynaecologist.

Need help understanding your cycle?

Book a consultation with Dr. Shakey Goyal.

Book Appointment
Important: This calculator provides an estimate based on calendar calculations and is not a medical diagnosis. Ovulation can vary from cycle to cycle, particularly when periods are irregular. Do not rely on this calculator alone to prevent pregnancy. For personalised medical advice, consult your gynaecologist.