Predict your next cycle and stay prepared.
Your menstrual cycle is often called the "fifth vital sign" of your health. Regular tracking helps you understand your body's patterns, predict mood shifts, and identify irregularities that might need medical attention.
A typical cycle is measured from the first day of one period to the first day of the next. While the "ideal" is 28 days, anything from 21 to 35 days is considered clinically normal for adult women. Irregularities can sometimes be a signal of stress, nutritional gaps, or hormonal imbalances like PCOS.
Use this calculator to plan your vacations, events, or simply to ensure you're always prepared with your preferred period products.