health
Ovulation Calculator
Calculate ovulation with our free online tool. Get instant results with helpful explanations and tips for better understanding.
Inputs
Enter the required values for the calculation
Results
View your calculation results
Enter values below to calculate
What is an Ovulation Calculator?
An Ovulation Calculator predicts fertile days and ovulation timing based on menstrual cycle length, helping with family planning.
How to use
Enter the first day of your last period and average cycle length. The calculator shows predicted ovulation and fertile window.