Intermittent Fasting
IF cycles between eating and fasting periods. Popular protocols: 16:8, 18:6, 20:4, OMAD. Plan your schedule with personalized meal timing, calorie targets, and metabolic benefit analysis.
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Ketosis begins ~12-14h fasting Autophagy peaks 16-24h 16:8 most popular for beginners
Ready to run the numbers?
Why: IF may support weight loss, metabolic health, and longevity. Research shows benefits for insulin sensitivity, autophagy, and fat burning.
How: This calculator uses your stats, activity level, and chosen protocol to estimate TDEE, calorie targets, eating window, and metabolic states (ketosis, autophagy).
Run the calculator when you are ready.
🌱 Beginner 16:8
New to intermittent fasting
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👩 Female-Friendly 14:10
Gentler protocol for women
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⚡ Advanced 18:6
Experienced faster, deeper ketosis
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🏃 Athletic 16:8
Training while fasting
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⚔️ Warrior 20:4
Warrior diet practitioner
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🎯 OMAD Expert
One meal a day protocol
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Fasting Profiles
🌱 Beginner 16:8
New to intermittent fasting
👩 Female-Friendly 14:10
Gentler protocol for women
⚡ Advanced 18:6
Experienced faster, deeper ketosis
🏃 Athletic 16:8
Training while fasting
⚔️ Warrior 20:4
Warrior diet practitioner
🎯 OMAD Expert
One meal a day protocol
📊 Basic Information
⏰ Fasting Protocol
Not recommended during pregnancy or breastfeeding
Those with eating disorder history should consult a professional
Your Fasting Schedule
🍽️ Meal Schedule
| Meal | Time | Calories | Protein |
|---|---|---|---|
| First Meal | 14:00 | 724 cal | 43g |
| Mid-Day Meal | 16:00 | 724 cal | 43g |
| Last Meal | 18:00 | 724 cal | 43g |
🔬 Metabolic Benefits
📈 Visual Analysis
24-Hour Breakdown
Health Benefits
📋 Recommendations
Leangains - 16 hours fasting (Most Popular) - Weight loss, general health, muscle retention
Eating window: 12:00 to 20:00 (8 hours)
Target 2172 calories in 3 meal(s)
Daily caloric deficit: 500 calories for 0.45kg/week loss
💡 Fasting Tips
Stay hydrated - aim for 8+ glasses of water during fast
Black coffee and plain tea are allowed during fast
Stay busy during fasting periods to avoid hunger thoughts
Hunger usually passes within 20-30 minutes
🍴 Breaking Your Fast
Start with easily digestible foods (proteins, vegetables)
Avoid breaking fast with high-sugar foods
Eat slowly and mindfully to prevent overeating
Disclaimer: Intermittent fasting is not suitable for everyone. Consult a healthcare provider before starting, especially if you have diabetes, eating disorders, are pregnant/breastfeeding, or take medications that require food. Listen to your body and discontinue if you experience negative symptoms.
For informational purposes only — not medical advice. Consult a healthcare professional before acting on results.
🏥 Health Facts
16:8 = 16h fast, 8h eating window
— Popular protocol
Intermittent Fasting Protocols
Intermittent fasting (IF) is an eating pattern that cycles between periods of fasting and eating. It doesn't specify which foods to eat, but rather when you should eat them. Research shows benefits for weight loss, metabolic health, and longevity.
16:8 (Leangains)
Most popular protocol. 16 hours fasting, 8-hour eating window.
Best for: Beginners, sustainable long-term
18:6 (Extended)
Enhanced fat burning. 18 hours fasting, 6-hour eating window.
Best for: Intermediate, deeper ketosis
20:4 / OMAD
Advanced protocol. Maximum autophagy and fat burning.
Best for: Experienced fasters
What Happens During Fasting
Health Benefits of IF
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