Period Calculator | Track Menstrual Cycle and Ovulation
Calculate your next period, ovulation dates, and fertile windows with our free period calculator. Plan ahead with accurate cycle predictions.
Calculate Your Next Period & Ovulation Days
Common Cycle Calculations
28-Day Cycle
Most common cycle length
30-Day Cycle
Longer regular cycle
32-Day Cycle
Extended cycle length
Understanding Your Cycle
Menstrual Phase
The first phase of your cycle when bleeding occurs, typically lasting 3-7 days.
Follicular Phase
Starts on day 1 of menstruation and continues until ovulation.
Ovulation Phase
Usually occurs around day 14 in a 28-day cycle, lasting 24-36 hours.
Luteal Phase
The final phase after ovulation until your next period, typically 14 days.
Tracking Benefits
Family Planning
Track your fertile window for pregnancy planning or prevention.
Health Monitoring
Identify irregular cycles that might indicate health issues.
Lifestyle Planning
Plan activities and events around your cycle phases.
Symptom Management
Prepare for and manage cycle-related symptoms effectively.
About this Calculator
Calculate your next period, ovulation dates, and fertile windows with our free period calculator. Plan ahead with accurate cycle predictions.