🔥 Thermic Effect of Food Calculator

Estimate calories burned just by digesting your meals (varies by macronutrients)

🍽️ Meal Macronutrients

Protein (grams)

Carbohydrates (grams)

Fats (grams)

📊 Your TEF Results

0

Calories burned digesting this meal

Protein TEF

0

(20-30% of protein calories)

Carbs TEF

0

(5-10% of carb calories)

Fats TEF

0

(0-3% of fat calories)

Total meal calories: 0 kcal

TEF percentage: 0% of meal calories

ℹ️ How to Use This Calculator & TEF Explanation ▼

🔍 What is the Thermic Effect of Food?

The Thermic Effect of Food (TEF) refers to the energy required for digestion, absorption, and metabolism of nutrients. It accounts for about 5-15% of your total daily energy expenditure.

📝 How to Use This Calculator

1. Enter the grams of protein, carbohydrates, and fats in your meal
2. The calculator will estimate calories burned through digestion
3. Results show breakdown by macronutrient and percentage of meal calories

⚖️ TEF by Macronutrient

• Protein: 20-30% of protein calories burned (highest TEF)
• Carbohydrates: 5-10% of carb calories burned
• Fats: 0-3% of fat calories burned (lowest TEF)
• Mixed meals: Typically 10-15% of total calories

🍗 Example Calculation

Meal containing:

• 40g protein (160 kcal)
• 60g carbs (240 kcal)
• 20g fat (180 kcal)
• Total calories: 580 kcal
• TEF Calculation:
• Protein: 160kcal × 25% = 40 kcal
• Carbs: 240kcal × 7.5% = 18 kcal
• Fats: 180kcal × 2% = 3.6 kcal
• Total TEF: 61.6 kcal (10.6% of meal)

💡 Practical Implications

• High-protein diets increase daily energy expenditure through higher TEF
• Processed foods typically have lower TEF than whole foods
• Eating frequency doesn't significantly change total daily TEF
• TEF is slightly higher in the morning than evening

⚠️ Limitations

• Individual variations exist based on genetics, insulin sensitivity, etc.
• Extreme diets (very low/high protein) may affect TEF percentages
• Fiber content and food processing aren't accounted for in this simple calculator