A typical serving of American cheese (1 slice, 21 g) has about 77 calories. Per 100 g: 366 kcal, 18.1 g protein, 4.8 g carbs, 30.7 g fat. The same 100 g carries 2.3 g of sugar. Most of the energy comes from fat.
| Serving | Weight | Calories |
|---|---|---|
| 1 slice | 21 g | 77 kcal |
| 1 cup, shredded | 113 g | 414 kcal |
| 100 g | 100 g | 366 kcal |
A processed single slice is about 77 calories, built to melt rather than to age. On the energy-density scale, 366 kcal per 100 g puts American cheese at the high end.
A typical serving (1 slice, 21 g) has about 77 calories, and 100 g has 366 kcal. Calories scale with weight, so double the portion means double the number.
There are 18.1 g of protein in 100 g of American cheese, which works out to about 3.8 g per serving (1 slice). It contributes meaningful protein, though most of the calories come from elsewhere.
Yes, in the plain arithmetic sense: 30.7 g of fat per 100 g supplies about 75% of the calories. Whether that fits your day depends on your totals, not on the food alone.
Every value on this page comes from USDA FoodData Central, entry 170853 (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 170853 (SR Legacy). Serving calories are computed from the per-100-g values.
