Menstrual Cycle Calculator

First day of last period:

Average cycle length (days):

Average period length (days):

Luteal phase length (days):

Your Menstrual Cycle Forecast

Next period starts:

Period ends:

Fertile window:

Estimated ovulation:

Three-Month Forecast

This calculator provides estimates based on your input. Individual cycles may vary. For medical concerns or irregular cycles, please consult a healthcare provider.