Ovulation Calculator
Estimate ovulation date and fertile window using your LMP and average cycle length.
Medical note
Ovulation timing varies person to person. This estimate assumes ovulation ~14 days before the next period. Use it for planning only.
May 8, 2026
Ovulation (est.)
May 3, 2026 – May 9, 2026
Fertile window
May 22, 2026
Next period (est.)
Next cycles (est.)
Cycle 2
Ovulation: Jun 5, 2026
Fertile: May 31, 2026 – Jun 6, 2026
Period: May 22, 2026
Cycle 3
Ovulation: Jul 3, 2026
Fertile: Jun 28, 2026 – Jul 4, 2026
Period: Jun 19, 2026
Cycle 4
Ovulation: Jul 31, 2026
Fertile: Jul 26, 2026 – Aug 1, 2026
Period: Jul 17, 2026
How to use
- Select the first day of your last period (LMP).
- Enter your average cycle length (days).
- View ovulation and fertile window estimates.
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