Ovulation calculator
Estimate your fertile window from your usual cycle. This is a general guide to help with timing — not a medical assessment, and never a prediction of pregnancy.
This tool is educational. Diagnosis and treatment choice must be confirmed by a fertility specialist after reviewing your history and reports.
Common questions
How accurate is an ovulation calculator?
An ovulation calculator gives a general estimate based on cycle averages, not a precise date. Ovulation varies between people and cycles, especially with irregular periods. It's a helpful guide for timing, but it isn't a medical assessment — a specialist can give you a clearer picture.
What if my cycles are irregular?
With irregular cycles, a simple calculator is less reliable because ovulation is harder to predict — which is itself worth understanding. If your cycles are unpredictable and you're trying to conceive, a fertility specialist can help map your actual pattern.
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