Ovulation Calculator
Free ovulation calculator to predict your fertile window and ovulation date. Track your menstrual cycle and find the best days to conceive.
How to Calculate Your Ovulation Date
- 1 Enter the first day of your last menstrual period
- 2 Enter your average cycle length in days
- 3 Click Calculate Ovulation to see your fertility calendar
- 4 View your estimated ovulation date and fertile window
- 5 Check the calendar for high and peak fertility days
🔒 Instant results, faster than AI. No signup. 100% private.
Last updated: January 15, 2026 · v2.1