Universal Calorie Calculator

Comprehensive Nutritional Analysis Tool for AP Students

Master BMR, TDEE, Macros, and Calorie Deficit Calculations

📚 Educational Overview for AP Students

This calculator demonstrates key concepts in human metabolism and nutrition science:

BMR (Basal Metabolic Rate): Energy required for basic physiological functions at rest
TDEE (Total Daily Energy Expenditure): Total calories burned including physical activity
Macronutrients: Protein, carbohydrates, and fats with different caloric densities
Energy Balance: Relationship between caloric intake and expenditure affecting body weight

🧬 Basal Metabolic Rate (BMR) & TDEE Calculator

Scientific Formulas Used:

Mifflin-St Jeor Equation (Most Accurate):

Men: \[ BMR = 10 \times \text{weight}_{\text{kg}} + 6.25 \times \text{height}_{\text{cm}} - 5 \times \text{age} + 5 \]

Women: \[ BMR = 10 \times \text{weight}_{\text{kg}} + 6.25 \times \text{height}_{\text{cm}} - 5 \times \text{age} - 161 \]

Harris-Benedict Equation (Classic):

Men: \[ BMR = 66.5 + 13.75 \times \text{weight}_{\text{kg}} + 5 \times \text{height}_{\text{cm}} - 6.75 \times \text{age} \]

Women: \[ BMR = 655.1 + 9.563 \times \text{weight}_{\text{kg}} + 1.85 \times \text{height}_{\text{cm}} - 4.676 \times \text{age} \]

TDEE Calculation:

\[ TDEE = BMR \times \text{Activity Factor} \]

Age (years):

Gender:

Weight (kg):

Height (cm):

Activity Level:

⚖️ Calorie Deficit/Surplus Calculator

Weight Management Principles:

Calorie Deficit:

\[ \text{Deficit} = \text{TDEE} - \text{Daily Intake} \]

Weight Loss Rate:

\[ \text{Weekly Loss} = \frac{\text{Daily Deficit} \times 7}{7700\,\text{calories/kg}} \]

Note: 1 kg of fat ≈ 7700 calories (3500 calories per pound)

🎯 Safe Weight Loss Guidelines

Recommended Deficit: 300-750 calories/day for sustainable loss

Rate: 0.5-1 kg (1-2 lbs) per week maximum

Minimum Intake: Never go below 1200 calories/day (women) or 1500 calories/day (men)

Your TDEE (calories/day):

Goal Weight (kg):

Target Loss Rate:

🧪 Macronutrient Calculator

Macronutrient Energy Values:

Protein: \[ 1\text{g} = 4\,\text{calories} \]

Carbohydrates: \[ 1\text{g} = 4\,\text{calories} \]

Fat: \[ 1\text{g} = 9\,\text{calories} \]

Alcohol: \[ 1\text{g} = 7\,\text{calories} \] (when applicable)

Calculation Formula:

\[ \text{Grams} = \frac{\text{Total Calories} \times \text{Percentage}}{\text{Calories per Gram}} \]

Total Daily Calories:

Goal Type:

Protein (%):

Carbohydrates (%):

Fat (%):

Total: 100%

🍎 Food Calorie Calculator

Food Energy Calculation (Atwater Method):

\[ \text{Total Calories} = (\text{Protein} \times 4) + (\text{Carbs} \times 4) + (\text{Fat} \times 9) \]

Per 100g basis: Multiply by portion size factor

Food Item:

Serving Size (g):

Protein (g per 100g):

Carbohydrates (g per 100g):

Fat (g per 100g):

👨‍🍳 Recipe Calorie Calculator

📝 Recipe Analysis Method

Add multiple ingredients to calculate total calories and nutrition per serving

Perfect for meal planning and portion control

Recipe Name:

Total Servings:

Ingredients:

🎓 Key Learning Points for AP Students

Biochemistry Connections:

ATP production from macronutrients
Metabolic pathways (glycolysis, β-oxidation)
Thermoregulation and energy expenditure

Mathematical Applications:

Linear equations in BMR calculation
Proportional relationships in macros
Rate calculations for weight change

Health Science Concepts:

Energy balance and homeostasis
Nutritional requirements across populations
Evidence-based dietary recommendations