How much protein is in cheddar cheese?

A complete dairy protein — read the portion, not just the 100 g

Cheddar is a genuinely complete protein: like all dairy, it carries every essential amino acid in the proportions your body can use, with no food-combining required. On paper it looks like a protein powerhouse — 24.3 g per 100 g, right up there with cooked meat — and it brings a serious calcium payload in the same bite. But the per-100-g number is where most people accidentally mislead themselves, because almost nobody eats 100 g of cheese in one sitting.

A realistic portion is about 1 ounce (28 g) — roughly a thumb-size cube or a single sandwich slice — and that delivers closer to 7 g of protein (24.3 × 28 ÷ 100 ≈ 6.8 g). That’s a useful amount, but it’s a top-up, not a main course. A chicken breast or a bowl of cottage cheese will out-protein a slice of cheddar several times over for far fewer calories. So the most honest way to read this page: cheddar is protein-dense by weight, and modestly protein-bearing by the portion you’ll actually eat.

The real trade-off: it’s a protein-and-calcium food, not a lean one

Here’s what the protein column doesn’t tell you. The same 100 g that carries 24.3 g of protein also carries about 33.8 g of fat — roughly 19 g of it saturated — for around 410 calories. Cheddar is one of the most calorie-dense foods in the fridge, and the fat, not the protein, is doing most of the heavy lifting on that calorie count. There’s a meaningful sodium load too: about 644 mg per 100 g (near 180 mg in that 1 oz piece), which is simply part of how cheddar is salted and preserved.

None of that makes cheddar “bad” — it makes it a flavor-and-nutrient food best used in moderation rather than a lean-protein staple you eat by the block. The smart framing is to let cheddar do what it’s great at: a small piece adds real protein, an outsized hit of calcium (~711 mg per 100 g, so ~200 mg in a single ounce — a notable share of a day’s need), and enough richness that a little goes a long way. For the bulk of your daily protein, leaner options carry the load with far less saturated fat and salt; cheddar is the seasoning on top.

Aged cheddar, lactose, and how to snack on it well

One underrated point in cheddar’s favor: it’s naturally very low in lactose, which is why this reference shows just 0.3 g of sugars per 100 g. Most of the milk sugar drains off with the whey during cheesemaking, and the small amount left keeps breaking down as the cheese ages — so sharp, aged cheddar is effectively near lactose-free and often sits well even for people who can’t drink a glass of milk. That makes it one of the more comfortable ways for the lactose-sensitive to get complete dairy protein and calcium in one go.

To make a portion genuinely satisfying instead of mindless, pair it. A 1 oz piece of cheddar with an apple or a handful of grapes, or a slice melted onto eggs, turns ~7 g of protein and a big calcium hit into a snack with built-in fiber and staying power — and the pairing naturally caps the portion so the calories and sodium stay sensible. To translate that 7 g into a number that fits your body weight and training, see how much protein per day. And if you’d rather skip the label math, the graded picks below point you to specific cheddars — already scored on protein, sodium, and ingredient quality — so you can choose a good block without squinting at the panel.