How much protein is in cheddar cheese?

Cheddar cheese has 22.9 g of protein per 100 g and 6.5 g per 1 oz (28 g). That is 5.7 g of protein per 100 kcal — a modest protein contribution.

Where do these calorie figures come from?

USDA FoodData Central record 173414, “Cheese, cheddar (Includes foods for USDA's Food Distribution Program)” (SR Legacy, FDC SR Legacy 2018-04 + FNDDS 2024-10-31). Energy is USDA nutrient 1008 (Energy, kcal); protein, fat and carbohydrate are read from the same record. USDA data is in the public domain, and the FDC ID above links straight to it.

All foods

CheeseUSDA SR LegacyFDC 173414

Calories in cheddar cheese

USDA FoodData Central record for “Cheese, cheddar (Includes foods for USDA's Food Distribution Program)” — per 100 g, per every USDA serving size, and next to the other cheese rows.

The short answer

Cheddar cheese: 403 kcal per 100 g. 1 oz (28 g) is 114 kcal with 6.5 g of protein. Source: USDA FoodData Central record 173414, "Cheese, cheddar (Includes foods for USDA's Food Distribution Program)".

Per 100 g

Nutrient	Per 100 g	Share of energy
Energy	403 kcal	100%
Protein	22.9 g	23%
Fat	33.3 g	74%
Carbohydrate	3.4 g	3%

Cheddar cheese is 403 kcal per 100 g in USDA FoodData Central (SR Legacy). Of that energy, about 23% comes from protein, 74% from fat and 3% from carbohydrate. That works out to 5.7 g of protein per 100 kcal — a modest protein contribution.

Per serving

The serving sizes USDA lists for this record, priced from the per-100 g figures above. Nothing here is rounded to a “portion” — the gram weight next to each label is what the calories are computed from.

Serving	Weight	Calories	Protein	Fat	Carbs
100 g	100 g	403	22.9 g	33.3 g	3.4 g
1 cup, diced	132 g	532	30.2 g	44 g	4.5 g
1 cup, melted	244 g	983	55.9 g	81.3 g	8.3 g
1 cup, shredded	113 g	455	25.9 g	37.6 g	3.8 g
1 oz	28 g	114	6.5 g	9.5 g	1 g
1 cubic inch	17 g	69	3.9 g	5.7 g	0.6 g
1 slice (1 oz)	28 g	113	6.4 g	9.3 g	1 g

Compared with other cheese

Food	kcal / 100 g	Protein / 100 g	Per serving
Cheddar cheese	403	22.9 g	114 kcal · 1 oz
Whole-milk mozzarella	299	22.2 g	85 kcal · 1 oz
Grated Parmesan	420	28.4 g	21 kcal · 1 tbsp
Feta cheese	265	14.2 g	75 kcal · 1 oz
Cream cheese	350	6.2 g	51 kcal · 1 tbsp
Swiss cheese	393	27 g	112 kcal · 1 oz

Worth knowing

Cheddar is about a third fat by weight, so it lands around 400 kcal per 100 g — one ounce (28 g), roughly a thick slice, is about 115 kcal. It also carries 23 g of protein per 100 g, which is why cheese is not empty calories, just dense ones.

Other tables in dairy and egg products

The same numbers for the foods this one usually shares a plate — or a shopping list — with.

Questions about cheddar cheese

How many calories are in cheddar cheese?: Cheddar cheese: 403 kcal per 100 g. 1 oz (28 g) is 114 kcal with 6.5 g of protein. Source: USDA FoodData Central record 173414, "Cheese, cheddar (Includes foods for USDA's Food Distribution Program)".
How much protein is in cheddar cheese?: Cheddar cheese has 22.9 g of protein per 100 g and 6.5 g per 1 oz (28 g). That is 5.7 g of protein per 100 kcal — a modest protein contribution.
Where do these calorie figures come from?: USDA FoodData Central record 173414, “Cheese, cheddar (Includes foods for USDA's Food Distribution Program)” (SR Legacy, FDC SR Legacy 2018-04 + FNDDS 2024-10-31). Energy is USDA nutrient 1008 (Energy, kcal); protein, fat and carbohydrate are read from the same record. USDA data is in the public domain, and the FDC ID above links straight to it.

How calorie.one logs it

Type “cheddar cheese” into calorie.one and the app matches this exact record — “Cheese, cheddar (Includes foods for USDA's Food Distribution Program)” — estimates the grams, and shows the line with its USDA label. You correct the amount; the per-100 g figure is never guessed. That split between recognition and arithmetic is the whole methodology. For the numbers in context, read Calories in olive oil, butter and cooking fats.