Intermittent Fasting Timer
Track your fasting and eating windows
Fasting Started:
Fasting Ends:
Eating Window:
⚠️ Medical Disclaimer: This calculator is for informational and educational purposes only. It is not intended as medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional before making health-related decisions.
About Intermittent Fasting Timer
Intermittent fasting (IF) is an eating pattern that cycles between periods of eating and fasting. This timer helps you track your fasting and eating windows accurately, making it easier to maintain your chosen fasting protocol.
Popular Fasting Protocols
- 16:8 (Lean Gains) - Fast for 16 hours, eat during 8-hour window (most popular)
- 14:10 - Fast for 14 hours, eat during 10-hour window (gentler for beginners)
- 20:4 (Warrior Diet) - Fast for 20 hours, eat during 4-hour window (advanced)
- 5:2 Diet - Eat normally 5 days, restrict calories 2 days
- OMAD (One Meal A Day) - Complete 23-hour fasts with one meal daily
How to Use This Timer
- Select your preferred fasting protocol (or create a custom one)
- Choose the time you want to start fasting
- Click "Start Fasting" to begin tracking
- The timer will display your current fasting duration
- See when your eating window begins and ends
Intermittent Fasting Benefits
- Weight loss and improved body composition
- Better insulin sensitivity and blood sugar control
- Reduced inflammation
- Enhanced brain function and mental clarity
- Cellular repair and autophagy
- Increased energy levels and metabolism
Fasting Tips
- Stay hydrated - drink plenty of water during fasting periods
- Black coffee and tea are fine during fasting windows
- Start gradually with shorter fasting windows (14:10) before progressing
- Eat nutritious, whole foods during eating windows
- Listen to your body and adjust protocols as needed
- Consult a healthcare provider if you have medical conditions
Frequently Asked Questions
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Reviewed by: Health & Nutrition Research Team
Last updated: December 2025