Ovulation Calculator
Predict your most fertile days based on your menstrual cycle. Enter the first day of your last period and cycle length to see your estimated ovulation date, fertile window, and next period date.
Inputs
Results
Ovulation Date
March 15, 2026
Fertile Window
March 10, 2026 - March 16, 2026
Next Period
March 29, 2026
Cycle Day
Day 5
Projected Cycles
| Cycle | Period Start | Fertile Window | Ovulation |
|---|---|---|---|
| 1 | March 1, 2026 | March 10, 2026 | March 15, 2026 |
| 2 | March 29, 2026 | April 7, 2026 | April 12, 2026 |
| 3 | April 26, 2026 | May 5, 2026 | May 10, 2026 |
| 4 | May 24, 2026 | June 2, 2026 | June 7, 2026 |
| 5 | June 21, 2026 | June 30, 2026 | July 5, 2026 |
| 6 | July 19, 2026 | July 28, 2026 | August 2, 2026 |