Cheese Calories & Nutrition Calculator

One standard slice of cheddar cheese (28g) contains 113 calories, 6.4g protein, 9.3g fat, and just 0.4g carbs. That single slice — roughly the size of two postage stamps stacked — delivers more calories than a whole medium egg (72 kcal) and nearly as much fat. Yet people routinely add 2–3 slices to sandwiches without logging them, creating an untracked 226–339 calorie addition ^[1].

The calorie density of cheese is remarkably high compared to most foods. Cheddar at 403 kcal/100g means that approximately 74% of its calories come from fat (33.1g fat × 9 cal/g = 298 fat calories out of 403 total). Even mozzarella, often perceived as a "lighter" option, delivers 280 kcal/100g with 17.6g fat — still calorically dense by any standard ^[1].

The Harvard T.H. Chan School of Public Health notes that one ounce of hard cheese provides about 120 calories, 8g protein, and 6g saturated fat. They recommend treating cheese as a flavoring rather than a main course component — a small amount of strongly flavored cheese like parmesan or aged cheddar provides more taste per calorie than large amounts of mild cheese ^[3].

Cheese is one of the richest dietary sources of calcium. Parmesan leads at 1,184mg calcium per 100g — exceeding the full daily recommended intake (1,000mg for most adults) in a single 100g portion. Swiss cheese follows at 890mg, cheddar at 721mg, and gouda at 700mg ^[1]. But these numbers come with a trade-off that's rarely discussed.

Parmesan's calcium comes packaged with 1,804mg sodium per 100g — that's 78% of the 2,300mg daily limit in 100 grams. Feta adds 917mg sodium per 100g. Gouda sits at 819mg. The only high-calcium cheese with genuinely low sodium is Swiss/Emmental at just 187mg sodium alongside 890mg calcium — the best calcium-to-sodium ratio of any common cheese ^[1].

At the other end, cottage cheese provides only 83mg calcium per 100g and cream cheese just 97mg — making them poor calcium sources despite being dairy products. If calcium tracking is a priority, the practical choice is Swiss cheese (890mg calcium / 187mg sodium) or a small amount of parmesan as a flavoring (1 tablespoon/5g = 59mg calcium but only 90mg sodium) ^[3].

The calorie range across common cheeses is enormous: from 98 kcal/100g (cottage cheese) to 420 kcal/100g (parmesan) — a 4.3× difference. This means swapping 100g of cheddar for 100g of cottage cheese saves 305 calories while actually providing comparable protein: cottage cheese delivers 11.1g protein vs. cheddar's 22.9g — roughly half the protein at roughly one-quarter the calories ^[1].

The protein-per-calorie ratio reveals which cheeses are most efficient for those tracking protein: Cottage cheese leads at 11.3g protein per 100 calories. Mozzarella delivers 7.9g per 100 calories. Parmesan provides 8.6g per 100 calories. Cream cheese ranks worst at only 1.8g protein per 100 calories — it is essentially a fat source, not a protein source, despite being labeled as cheese ^[1].

For practical calorie-conscious use: ricotta (174 kcal/100g) sits in the middle ground, offering decent protein (11.3g) without the extreme fat load of hard cheeses. A half-cup serving of ricotta (113g) delivers 197 calories and 12.8g protein — comparable to a small chicken breast in protein but in a spreadable, versatile form ^[2].

Cheese aging concentrates nutrients by removing moisture. A fresh mozzarella contains approximately 50–60% water, while an 18-month aged parmesan has only 30% water. This moisture loss means that every nutrient — protein, fat, calcium, and sodium — exists in higher concentrations per gram in aged cheeses ^[2].

This explains why parmesan has 36g protein per 100g (highest of any common cheese) while cottage cheese has only 11.1g — the difference is largely water content. If you dehydrated cottage cheese to the same moisture level as parmesan, its nutrient density per gram would be much closer. For journaling purposes, this means aged cheeses deliver more nutrition per bite but also more calories and sodium per bite ^[2].

The aging process also breaks down lactose. Parmesan, aged cheddar, and Swiss contain less than 1g sugar per 100g because bacteria have consumed virtually all the lactose during ripening. Fresh cheeses like ricotta (0.3g sugar) and cottage cheese (2.7g sugar) retain more lactose. Cream cheese at 3.8g sugar per 100g contains the most among the variants listed, reflecting its minimal aging ^[4].

Saturated fat is the single most tracked nutrient in cheese. Here is the actual USDA data per 100g: Cream cheese leads at 19.3g saturated fat, followed by cheddar (18.9g), Swiss (19.2g), gouda (17.6g), brie (17.4g), and parmesan (17.3g). The lowest saturated fat options are cottage cheese (1.7g) and ricotta (8.3g) ^[1].

Per standard serving (28g slice/1 oz), the saturated fat values become more manageable: cheddar delivers 5.3g, Swiss 5.4g, brie 4.9g, and gouda 4.9g per slice. The American Heart Association's general daily guidance is to aim for a certain intake based on individual calorie needs. A single slice of most hard cheeses represents a meaningful portion of daily saturated fat intake ^[5].

Zhang et al. (2023) conducted an umbrella review of 58 prospective studies examining cheese consumption patterns. Their meta-analysis noted complex associations that varied by cheese type and quantity, reinforcing that the nutritional impact depends heavily on which cheese is consumed and in what amount — not on cheese as a generic category ^[1]. This underscores why tracking the specific cheese type, not just "cheese," matters for accurate nutrition journaling.