Ovulation Calculator

Calculate your ovulation date and most fertile days to help plan pregnancy. Free fertility calendar.

100% Private

Instant

Any Device

Free Forever

Your Cycle

Enter your cycle information

First Day of Last Period

Average Cycle Length (days)

Fertile Window

Your most fertile days

Enter your last period date to calculate

Frequently Asked Questions

Calculate your exact age in years, months, and days.

Optimal sleep/wake times.

Daily hydration needs.