Track your menstrual cycle, predict next period date, fertile window, and ovulation with personalized cycle insights for health monitoring.
A period tracker estimates upcoming menstrual cycle dates based on past period start dates and average cycle length. Predicts next period start date, ovulation timing, fertile window for conception (or avoidance), PMS symptom timing, and future period dates for trip planning. Average cycle is 28 days (range 21-35 days normal), with period lasting 3-7 days. Tracks cycle regularity to identify patterns or irregularities needing medical attention. Essential for reproductive health awareness, conception planning, avoiding surprises during travel or events, and monitoring cycle health.
Plan life around menstrual cycle by knowing period dates months in advance—schedule vacations, important events, weddings, competitions avoiding period dates. Understand fertility timing for conception planning or natural family planning awareness. Identify cycle irregularities early: consistently short cycles (<21 days), long cycles (>35 days), or varying cycle lengths may indicate hormonal imbalances, PCOS, thyroid issues, or other conditions requiring medical evaluation. Track PMS patterns to anticipate mood changes, energy levels, and physical symptoms, allowing proactive self-care planning. For athletes: schedule training around cycle phases to optimize performance based on hormone fluctuations. Prepare for period needs: ensure supplies available, plan around physical discomfort, adjust workout intensity.
Enter date of last period start and average cycle length (count from first day of period to first day of next period). Calculator shows next predicted period date, estimated ovulation date (typically cycle day 14, or 14 days before next period), fertile window (6 days ending on ovulation day), and projected dates for next 6-12 months. For irregular cycles, track for 3-6 months to establish average length. Use cycle tracking apps for more detailed symptom tracking, flow intensity, mood patterns, and physical symptoms. If cycles vary by more than 7-9 days regularly or are consistently outside 21-35 day range, consult gynecologist. Factors affecting cycles: stress, significant weight changes, excessive exercise, travel, illness.
Calculate ovulation date, fertile window, and best conception days based on your menstrual cycle for family planning and pregnancy optimization.
Calculate your accumulated sleep debt and get personalized recovery recommendations for better health and cognitive performance.
Calculate your Body Mass Index (BMI), understand your weight category, and get personalized health recommendations based on WHO standards.
Calculate your pregnancy due date, conception date, and trimester milestones using LMP or ultrasound dates with clinical accuracy.
Calculate body fat percentage using Navy method, get health risk assessment, and visualize your body composition with personalized recommendations.
Calculate your personalized daily water intake based on weight, activity level, climate, and health factors for optimal hydration.
Common questions about period tracker | next period calculator & cycle tracker