Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Protein Requirement Calculator
Estimate daily protein needs in grams from body weight and activity level. Designed to scale recommendations from the WHO baseline (~0.8 g/kg for sedentary adults) upward for active people, athletes, and those building or preserving muscle.
BMR / TDEE Calculator
Estimate your daily calorie needs using the revised Harris-Benedict equation, then adjust for activity to get your Total Daily Energy Expenditure (TDEE) — the rough number of calories you burn in 24 hours when you eat a maintenance diet. Enter your weight in kilograms, height in centimetres, age, biological sex, and an activity multiplier (sedentary 1.2, lightly active 1.375, moderately active 1.55, very active 1.725, extremely active 1.9). The result is what most nutrition guides call your "maintenance calories" — a starting point for designing a deficit (to lose weight), a surplus (to gain muscle), or a recomposition plan.
Key differences
| Protein Requirement Calculator | BMR / TDEE Calculator | |
|---|---|---|
| Category | Nutrition | Health |
| Inputs required | 2 | 5 |
| Result | Daily Protein Requirement (grams) | Daily Calorie Needs (calories) |
| What it does | Estimate daily protein needs in grams from body weight and activity level. Designed to scale recommendations from the WHO baseline (~0.8 g/kg for sedentary adults) upward for active people, athletes, and those building or preserving muscle. | Estimate your daily calorie needs using the revised Harris-Benedict equation, then adjust for activity to get your Total Daily Energy Expenditure (TDEE) — the rough number of calories you burn in 24 hours when you eat a maintenance diet. Enter your weight in kilograms, height in centimetres, age, biological sex, and an activity multiplier (sedentary 1.2, lightly active 1.375, moderately active 1.55, very active 1.725, extremely active 1.9). The result is what most nutrition guides call your "maintenance calories" — a starting point for designing a deficit (to lose weight), a surplus (to gain muscle), or a recomposition plan. |