Free & Accurate Ovulation Calculator
Pinpoint your most fertile days and take control of your conception journey. Our calculator uses scientifically-backed methods to help you understand your cycle.
Calculate Your Fertile Window
Select the first day of your most recent menstrual period
Most women have cycles between 28-32 days. The average is 28 days.
Your Calendar Will Appear Here
Enter your information and click "See My Calendar" to view your personalized fertility calendar.
How This Works
Our calculator uses the standard scientific method based on your menstrual cycle to estimate your most fertile days.
Scientific Method
Based on the standard ovulation prediction method used by fertility specialists worldwide.
Cycle Tracking
Uses your last menstrual period and average cycle length to predict ovulation timing.
Fertile Window
Identifies your 6-day fertile window when conception is most likely to occur.
Important Note
This calculator provides estimates based on average cycle patterns. Every woman's body is unique, and actual ovulation may vary. For the most accurate tracking, consider using additional methods like ovulation tests or basal body temperature monitoring.