Ovulation Calculator
The ovulation calculator estimates your most fertile days based on your menstrual cycle. Ovulation typically occurs about 14 days before your next period, and the fertile window spans approximately 5 days before and 1 day after ovulation.
By entering the first day of your last period and your average cycle length, this tool estimates your ovulation date, fertile window, and next expected period. This information can help with family planning, whether you're trying to conceive or simply want to understand your cycle better.
How it works
Ovulation Date = Last Period Date + (Cycle Length − 14 days). Fertile Window = Ovulation Date − 5 days to Ovulation Date + 1 day.
Use cases
- Estimating the best days for conception
- Tracking your menstrual cycle patterns
- Planning around your fertile window
- Understanding your reproductive health