Periods Per Month Calculator

Given that menses is latin for month, it would seem intuitive that we get one period per month. Chances are good that's not the case for most of us, and that we have some months with more than one period [crowd hiss!]

Use this calculator to check how many periods, on average, you have per year, and if you have more than one monthly period.

Member? login and your average cycle length will fill in!