Ovulation Calculator
ovulation_calculatorRead-onlyIdempotent
Free ovulation calculator: estimate your ovulation day, fertile window and next period from your last period and cycle length, with dates for the next 4 cycles. Web page: https://calcbright.com/ovulation-calculator
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| date | No | First day of your last period (YYYY-MM-DD) | 2026-10-01 |
| cycle | No | Average cycle length (days) | |
| luteal | No | Luteal phase length (days) Days from ovulation to your next period – 14 for most people. |