Predict your next 3 period dates based on your last period and cycle length.
Actual dates may shift 3-5 days due to stress or hormonal changes.
Knowing when your period is coming helps you plan your schedule, prepare supplies, time fertility activities, and identify if your period is late. Women with very regular cycles can predict periods 2-3 months ahead with good accuracy using this calculator.
Medical Disclaimer: This tool is for educational purposes only and should not replace professional medical advice. Always consult a qualified healthcare provider.
The next period date calculator predicts when your upcoming menstrual period will begin based on your last period start date and average cycle length. Knowing when to expect your period helps you plan your life, manage PMS symptoms, and understand your fertile window.
Add your average cycle length to the first day of your last period. If your last period started June 1 and your cycle is 28 days, your next period is expected around June 29. For a 30-day cycle starting June 1, expect your next period around July 1.