Ovulation
Calculator
Estimate ovulation dates, fertile windows, and best conception days based on menstrual cycle length.
Input
Current Cycle
Estimated Ovulation
Apr 3, 2026
Fertile Window
FertileMar 29, 2026 – Apr 3, 2026
Most Fertile Days
PeakApr 1, 2026 – Apr 3, 2026
Ovulation Day
OvulationApr 3, 2026
Next Period
PeriodApr 17, 2026
Luteal Phase Starts
Apr 4, 2026
How It Works
Ovulation typically occurs about 14 days before the start of your next period (the luteal phase). The fertile window spans 6 days: the 5 days before ovulation plus ovulation day itself.
The most fertile days are the 2 days before ovulation and ovulation day, when conception is most likely.
This calculator provides estimates based on average cycle patterns. Individual cycles may vary. Consult a healthcare provider for personalized fertility guidance.
Multi-Cycle Timeline
| Cycle | Ovulation | Fertile Window | Next Period |
|---|---|---|---|
| Cycle 1 | Apr 3, 2026 | Mar 29, 2026 – Apr 3, 2026 | Apr 17, 2026 |
| Cycle 2 | May 1, 2026 | Apr 26, 2026 – May 1, 2026 | May 15, 2026 |
| Cycle 3 | May 29, 2026 | May 24, 2026 – May 29, 2026 | Jun 12, 2026 |