Ovulation Calculator
Estimate your most fertile days and ovulation date based on your menstrual cycle length and last period.
How to Use the Ovulation Calculator
- 1
Enter last period date
Input the first day of your last menstrual period.
- 2
Enter cycle length
Input your average menstrual cycle length in days.
- 3
View fertile window
See your estimated ovulation date and fertile days.
💡 Tips & Tricks
- •Track several cycles to determine your average cycle length for better predictions.
- •Ovulation predictor kits can confirm the calculator's estimate.
- •Stress, illness, and travel can shift ovulation timing even in regular cycles.
Frequently Asked Questions
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