Health & fitness · NUMORA
Ovulation Calculator
LMP + cycle → ovulation and fertile days.
Open interactive calculatorHow to use
Estimate ovulation and the fertile window from cycle length — not a diagnosis.
Formula
ovulation ≈ LMP + cycle − 14 days
FAQ
Is this Ovulation calculator accurate?
The formula and assumptions are shown on the page, and the engine is covered by audit tests. Results are for reference — not financial or medical advice.
Do I need an account?
No. Calculations run in your browser. Recents can stay on this device.
What inputs do I need?
Estimate ovulation and the fertile window from cycle length — not a diagnosis.
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