Find Your Cycle Length
Use this free tool to estimate your menstrual cycle length and choose the cycle range that best fits your Lovesafe Calendar app or printed planner. Your cycle length is the number of days from the first day of one period to the first day of your next period.
Enter Your Period Dates
Start with the first day of one period to the first day of your next period.
Calculate Cycle Length
The calculator shows how many days are in your menstrual cycle.
Choose Lovesafe Range
Use your result to choose the range that fits your cycle.
Disclaimer:
This tool provides estimates for informational purposes only. It is not medical advice and does not guarantee ovulation timing, fertile days, safe days, pregnancy, or pregnancy prevention.
Average Cycle Length
For a better estimate, enter three recent cycle lengths and use the average result.
- Click on the calendar to enter the date.
Single Cycle Length
Use this option for a quick estimate using one recent cycle.
- Click on the calendar to enter the date.
Use your cycle length with Lovesafe Calendar
Use your result to choose the Lovesafe range that fits your cycle:
21–25 days, 26–31 days, 32–37 days, or 38–42 days
Then choose the format that works best for your routine.