Period Calculator

Calculate Future Periods

First Day of Last Period

Average Cycle Length (days)

Period Length (days)

Predict Next Months

Cycle Health Tips

Track Your Cycle

Note the start and end dates of your period
Monitor cycle length variations
Record symptoms throughout your cycle
Track energy levels and mood changes

When to Seek Medical Advice

Periods lasting longer than 7 days
Cycles shorter than 21 or longer than 35 days
Excessive bleeding or severe pain
Irregular or missed periods