When am I most fertile?

Identify your most fertile days and estimated ovulation date based on your cycle.

First day of last period

Cycle Length (days)

Fertile Window

—

Estimated Ovulation Date

—

The Methodology

Ovulation = Last Period + (Cycle Length - 14)

This tool uses the verified professional formula shown above. We cite our sources so you can trust every result.

Understanding your cycle

Tracking your ovulation is the first step in planning a pregnancy. Our calculator helps you identify the 6-day window where conception is most likely.