Ovulation Calculator

Estimate your most fertile days to increase your chances of conception.

Your Fertile Window

Estimated Ovulation Date N/A
Fertile Window N/A

How the Ovulation Calculator Works

Our Ovulation Calculator estimates your most fertile days based on your menstrual cycle.

How This Calculator Determines Your Fertile Window

  1. Input Your Details: Enter the first day of your last menstrual period and your average cycle length.
  2. Ovulation Date Estimation: The calculator estimates your ovulation date by subtracting 14 days from your cycle length and adding that to your last period date.
  3. Fertile Window Calculation: Your fertile window is the few days leading up to and including your ovulation date.