⏰ Intermittent Fasting Calculator
Plan your intermittent fasting schedule, calculate eating windows, and track your fasting progress. Optimize your health and weight loss journey.
Choose Your Fasting Protocol
Personal Information
Fasting Methods Comparison
| Method | Fasting | Eating | Difficulty | Best For |
|---|---|---|---|---|
| 14:10 | 14 hours | 10 hours | Easy | Beginners |
| 16:8 | 16 hours | 8 hours | Moderate | Most people |
| 18:6 | 18 hours | 6 hours | Moderate-Hard | Weight loss focus |
| 20:4 | 20 hours | 4 hours | Hard | Advanced fasters |
| OMAD | 23 hours | 1 hour | Very Hard | Experienced only |
| 5:2 | 2 days/week | 5 days normal | Variable | Flexible schedule |
Science of Intermittent Fasting
How It Works
Intermittent fasting cycles between periods of eating and fasting. During fasting, insulin levels drop, allowing your body to access stored fat for energy.
Key Benefits
- Weight Loss: Reduced calorie intake + increased fat burning
- Insulin Sensitivity: Improved blood sugar control
- Autophagy: Cellular cleaning and repair process
- Brain Health: Increased BDNF (brain-derived neurotrophic factor)
- Heart Health: Improved blood pressure and cholesterol
- Simplicity: Fewer meals to plan and prepare
Who Should Avoid Fasting
- Pregnant or breastfeeding women
- Children and teenagers
- People with eating disorders
- Type 1 diabetics (without medical supervision)
- Those on certain medications
Tips for Success
- Start gradually (12 hours → 14 → 16)
- Stay hydrated with water, coffee, tea
- Keep busy during fasting hours
- Eat nutrient-dense meals during eating window
- Get adequate sleep (7-9 hours)
- Be consistent with your schedule