How Long Is My Cycle?
To know how long your cycle is, count from the first day of one period to the first day of your next period. Your cycle length is every day between periods — not only the days you bleed.
How to count your cycle
If your period starts on June 5 and your next period starts on July 3, your cycle is 28 days long.
Day 1 is always the first day of full bleeding, not spotting. The day before your next period is the last day of that cycle.
How do I know my cycle length?
Track your period start dates for several months. One cycle alone may not tell the whole story because periods can shift with stress, illness, travel, or hormones.
Log your period start date, period end date, flow, cramps, spotting, and mood. After a few months, a pattern usually appears.
Is my cycle normal?
A regular cycle does not have to be exactly 28 days. Some people naturally have shorter or longer cycles. What matters is whether the pattern is predictable for you and whether symptoms are manageable.
Use a period cycle length calculator
A period cycle length calculator lets you enter recent period start dates and instantly see your cycle length and recent average — much faster than counting on a paper calendar.