A typical serving of whey protein (1 scoop, 29 g) has about 103 calories. Per 100 g: 359 kcal, 58.1 g protein, 29.1 g carbs, 1.2 g fat. The same 100 g carries 1.2 g of sugar. Protein supplies most of that energy.
| Serving | Weight | Calories |
|---|---|---|
| 1 scoop | 29 g | 103 kcal |
| 3 scoops | 86 g | 309 kcal |
| 100 g | 100 g | 359 kcal |
A standard scoop of this isolate powder is about 103 calories with 17 g of protein. On the energy-density scale, 359 kcal per 100 g puts whey protein at the high end. Protein density is strong: about 16.2 g of protein per 100 calories.
A typical serving (1 scoop, 29 g) has about 103 calories, and 100 g has 359 kcal. Calories scale with weight, so double the portion means double the number.
There are 58.1 g of protein in 100 g of whey protein, which works out to about 16.7 g per serving (1 scoop). That is a genuinely high protein share for the calories.
There are 29.1 g of carbohydrate per 100 g of whey protein, or about 8 g in 1 scoop (29 g).
Every value on this page comes from USDA FoodData Central, entry 173177 (SR Legacy). Serving figures are converted from the per-100-g data, so rounding can shift a total by a calorie or two.
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Get JoulesA note on accuracy: calculators like this one provide estimates based on population-level formulas — your real needs vary with genetics, muscle mass, medical conditions, and more. Results are for information only and are not medical advice, a diagnosis, or a prescription. Talk to a doctor or registered dietitian before making significant changes to your diet or exercise, especially if you have a health condition, are pregnant, or are under 18.
Nutrition data: USDA FoodData Central, FDC ID 173177 (SR Legacy). Serving calories are computed from the per-100-g values.
