Precision Ovulation Calculator

Find your 5-day fertile window using your cycle data — backed by clinical algorithms.

50,000+ women

Clinic-backed

Your results will appear here

Fill in your LMP and cycle length on the left, then tap Calculate.

Ovulation date — waiting for your data

Fertile window — waiting for your data

Next period — waiting for your data

Cycle day map — waiting for your data

Get the best tips and tools for a healthy conception.

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Log your BBT and symptoms for better accuracy.

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Calculate when you likely conceived your baby.

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Monthly conception probability analysis.

Pinpoint your most fertile 5-day span.

Adjust for delayed or long cycles.

Advanced algorithmic tracking.

Estimated date based on LMP or IVF.

Exact tracking of your pregnancy stage.

Pre-conception Care

Taking prenatal vitamins like One A Day with folic acid and DHA can support fertility and healthy baby development even before you conceive.

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