Calculate your Total Daily Energy Expenditure (TDEE) with our free Calorie Calculator. Using the Mifflin-St Jeor metabolic formula, estimate your Basal Metabolic Rate (BMR), select weight deficit or surplus targets, and split daily calories into protein, carbohydrate, and fat grams with 100% offline privacy.
Select Metric or Imperial units, set gender, and enter your age, weight, and height.
Choose your physical activity level from sedentary to extra active to compute your TDEE.
Select your target weight goal and toggle diet split tabs to inspect daily macro gram targets.
Your age, weight, height, and activity metrics are computed entirely inside browser JS memory — zero server uploads.
The animated SVG energy ring and macronutrient progress bars re-evaluate instantly as you adjust sliders or diet presets.
Uses the Mifflin-St Jeor equation to compute Basal Metabolic Rate (BMR) and applies physical activity coefficients for accurate TDEE estimation.
Managing daily energy balance begins by calculating Basal Metabolic Rate (BMR) — the minimum calories consumed at thermal neutrality to sustain cellular life. The Mifflin-St Jeor formula expresses BMR as: \(\text{BMR} = 10 \cdot W + 6.25 \cdot H - 5 \cdot A + s\) (where \(W\) is weight in kg, \(H\) is height in cm, \(A\) is age in years, and \(s = +5\) for males or \(-161\) for females).
To compute Total Daily Energy Expenditure (TDEE), BMR is multiplied by physical activity multipliers: Sedentary (\(1.2\)), Light (\(1.375\)), Moderate (\(1.55\)), Heavy (\(1.725\)), or Extra Active (\(1.9\)).
Macronutrient partitioning splits target daily calories into grams using caloric density factors: Protein (\(4 \text{ kcal/g}\)), Carbohydrates (\(4 \text{ kcal/g}\)), and Dietary Fats (\(9 \text{ kcal/g}\)).