Ovulation — Free Online Calculator
Fertile window. Free ovulation with instant results.
Last updated: 2026-06-01
Ovulation Calculator
days
Twenty Eight
days
Five
Ovulation typically occurs 12-14 days before your next period. The fertile window spans 5 days before ovulation through 1 day after.
Planning for Conception?
Understanding your fertile window can help with family planning. Track your cycles for more accurate predictions.
Results are estimates for planning purposes only. Verify important financial or health decisions with a qualified professional.
Related guides
- Ovulation & Fertility Window Explained
Fertile window timing, ovulation detection methods, and cycle-length adjustments for conception.