Menstrual Cycle Tracker

Predict your cycle, ovulation, and fertile window

Enter your cycle information for personalised predictions

First day of your last period

Average cycle length (days)21–45

Count from day 1 of one period to day 1 of the next

Average period length (days)2–10

Menstrual Phase

Days 1-5

Follicular Phase

Days 1-13

Ovulatory Phase

Days 14-16

Luteal Phase

Days 15-28

These predictions are based on a regular cycle. Stress, illness, travel, weight changes, and hormonal conditions like PCOS can affect your cycle.

Ovulation timing varies. This tool estimates — it should not replace medical family planning advice or contraception.

If your periods are very irregular, speak with a healthcare provider.

This tool is for educational purposes only and should not be used as contraception. Always use reliable contraception to prevent unwanted pregnancy.