The most accurate, privacy-focused tool to track your fertility window and ovulation date. No login required.
Understanding your menstrual cycle is the first step toward conception. Our tool estimates your fertile window—the days when you are most likely to get pregnant. By tracking your cycle, you can identify your exact ovulation day and increase your chances of success.
The calculator uses the Standard Days Method. It takes the first day of your last period and your average cycle length to project your biological rhythm. For most women, ovulation occurs about 14 days before the next period starts.