Ovulation Calculator
Find your ovulation date and fertile window to maximize chances of conception.
About Ovulation & the Fertile Window
Ovulation typically occurs 14 days before the next period. The fertile window spans 5 days before ovulation plus ovulation day — the egg survives 12–24 hours, while sperm can survive 3–5 days in the reproductive tract.
Fertility Window Guide
| Days Before Ovulation | Fertility Level |
|---|---|
| 5 days before | Fertile |
| 4 days before | Fertile |
| 3 days before | Fertile |
| 2 days before | Peak Fertile |
| 1 day before | Peak Fertile |
| Ovulation Day | Ovulation |
This calculator is for educational purposes only. Consult a qualified healthcare professional for medical advice.