How does the period calculator work?
This calculator uses the calendar method to predict your future periods. It takes the first day of your last period and adds your average cycle length to estimate when your next period will start. The average menstrual cycle is 28 days, but cycles between 21 and 45 days are considered normal.
How accurate is this calculator?
The calendar method provides a rough estimate. Actual cycle length can vary month to month due to stress, illness, hormonal changes, and other factors. For more accurate predictions, track your cycle over several months. Meowa uses your actual tracking data and AI to improve predictions over time.
What is a normal cycle length?
A normal menstrual cycle ranges from 21 to 35 days, with the average being 28 days. Cycles shorter than 21 days or longer than 35 days may warrant a conversation with your healthcare provider. Cycle length can also change naturally with age, particularly during the teenage years and perimenopause.
When should I see a doctor?
Consider seeing a healthcare provider if your period is consistently irregular, you miss periods for 3 or more months, your period lasts longer than 7 days, you experience severe pain that interferes with daily life, or you notice significant changes in flow or cycle length.