Use our menstrual cycle calculator to calculate your next period, ovulation & due date. Enter the date of your last period, how long it lasted, the length of your average cycle and press Calculate: Learn more about your menstrual cycle    Check out our infographic.    Learn how menstrual cycle and period calculators work.   Get answers to some common questions about your menstrual cycle:   How do I calculate the length of my cycle?   Can I have sex during my period?   What is the average length for period?   and others Our Other Calculators & Tests: Latest From Our Blog MENSTRUAL

Calculate Your Next Period, Ovulation & Due Date