Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Nutrition
BMR Calculator
Estimate your basal metabolic rate (BMR) — the calories your body burns at complete rest — using the revised Harris-Benedict equation. The starting point for calculating how many calories you need to eat to lose, maintain, or gain weight.
Fill in the required fields to see your result.
Nutrition
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.
Fill in the required fields to see your result.
Key differences
| BMR Calculator | Protein Requirement Calculator | |
|---|---|---|
| Category | Nutrition | Nutrition |
| Inputs required | 4 | 2 |
| Result | Your BMR (calories/day) | Daily Protein Requirement (grams) |
| What it does | Estimate your basal metabolic rate (BMR) — the calories your body burns at complete rest — using the revised Harris-Benedict equation. The starting point for calculating how many calories you need to eat to lose, maintain, or gain weight. | 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. |