Menstrual Period Calculator
Track your cycle and predict important dates
Next Period
Ovulation Date
Cycle Day
Cycle Timeline
Fertility Window
Fertile Period Starts
-Most Fertile Days
-Fertile Period Ends
-Cycle Insights
Period Calculation Examples
Regular Cycle
Last Period: June 1, 2024
Cycle Length: 28 days
Next Period: June 29, 2024
Based on average cycle
Longer Cycle
Last Period: June 1, 2024
Cycle Length: 35 days
Next Period: July 6, 2024
Adjusted for longer cycle
Shorter Cycle
Last Period: June 1, 2024
Cycle Length: 21 days
Next Period: June 22, 2024
Adjusted for shorter cycle
Menstrual Cycle Calculations
Next Period Date
Last Period + Cycle Length
Standard cycle:
28 days
Range: 21-35 days
Ovulation Date
Next Period - Luteal Phase (14 days)
Typically occurs:
14 days before next period
Range: 11-17 days
Fertile Window
Ovulation Date ± 5 days
Most fertile:
2 days before ovulation
Sperm survival: 3-5 days
Benefits & Features
Our period calculator provides valuable benefits for menstrual cycle tracking:
Cycle Tracking
- Period prediction
- Ovulation estimation
- Fertile window calculation
- Cycle length analysis
- Pattern recognition
Health Monitoring
- Cycle regularity check
- Symptom tracking
- Health pattern analysis
- Cycle changes monitoring
- Wellness insights
Planning Tools
- Event planning assistance
- Healthcare scheduling
- Fertility tracking
- Pregnancy planning
- Activity scheduling
Frequently Asked Questions
How accurate is period prediction?
Prediction accuracy depends on:
- Cycle regularity
- Tracking consistency
- Hormonal changes
- Health conditions
- Lifestyle factors
What affects cycle length?
Cycle length can be influenced by:
- Hormonal changes
- Stress levels
- Diet and exercise
- Sleep patterns
- Medical conditions
How is ovulation calculated?
Ovulation timing considers:
- Luteal phase length
- Cycle variations
- Physical symptoms
- Hormonal patterns
- Basal temperature
What is the fertile window?
Fertile window includes:
- 5 days before ovulation
- Ovulation day
- 24 hours after ovulation
- Peak fertility days
- Sperm survival period
When should I track my period?
Important tracking points:
- First day of bleeding
- Period duration
- Cycle symptoms
- Flow intensity
- Physical changes