Period calculator: Track your menstrual cycle

Track your menstrual cycle , predict periods and ovulation, and identify fertile days with this easy-to-use period calculator and fertility calendar. Figure out the exact date of your period for the next six months as well as your fertility window and ovulation dates with this easy to use calculator . A free, private online period tracker and ovulation calculator . Instantly track your menstrual cycle , predict future periods, and identify fertile days. No app download needed. Period Calculator Our online tools will provide quick answers to your calculation and conversion needs. On this page, you can calculate the beginning of period ( menstrual cycle ) dates for the next 12 calendar months. You can note down the dates for your use in a private period tracker.