Enter the first day of your last period, your cycle length and how many days your period lasts to see your next six expected periods. Handy for planning travel, events and tracking your cycle.
How to use it
- Pick the first day of your last period.
- Enter your cycle length and period length.
- Read your next six expected periods.
Questions about this tool
How long is a normal cycle?
Cycles of roughly 21 to 35 days are common in adults, and the length can change from month to month.
Why is my predicted date off?
Stress, illness, travel and other changes can shift a cycle, so predictions are estimates. If periods are very irregular, talk to a doctor.