Period Calculator

The menstrual cycle is the time from the first day of one period to the first day of the next. A normal cycle ranges from 21 to 35 days, with an average of 28 days. The next period date is calculated by adding the cycle length to the last period date.

You should consult a doctor if your cycle is shorter than 21 days or longer than 35 days, if you experience bleeding between periods, if your period lasts more than 7 days, or if you miss your period for more than 3 months.

Yes. Stress, excessive exercise, weight changes, and sleep irregularities can affect hormonal balance and lead to menstrual irregularities. A regular lifestyle and stress management help maintain cycle regularity.