Plain low-fat yogurt is cultured from lowfat milk (typically 1–2% fat) and has the same measured density as whole milk yogurt: 1.036 g/ml. A cup weighs approximately 245 g; a tablespoon weighs about 15.3 g — identical to whole milk yogurt at any scale you would encounter in cooking. The lower fat content does not produce a measurable density difference at this level. Low-fat yogurt is slightly thinner in texture than whole milk yogurt, which can affect how much air is trapped in a measuring cup — if anything, low-fat yogurt settles slightly more densely. Used as a lighter-fat substitute in dressings, dips, and baked goods.
What is Yogurt, Plain, Low Fat?
Plain low-fat yogurt is cultured from lowfat milk (typically 1–2% fat) and has the same measured density as whole milk yogurt: 1.036 g/ml. A cup weighs approximately 245 g; a tablespoon weighs about 15.3 g — identical to whole milk yogurt at any scale you would encounter in cooking. The lower fat content does not produce a measurable density difference at this level. Low-fat yogurt is slightly thinner in texture than whole milk yogurt, which can affect how much air is trapped in a measuring cup — if anything, low-fat.
Dairy products (milk, cream, yogurt, cheese) have different fat and water percentages. Volume hides these differences; weight keeps sauces, batters, and doughs consistent.
Fat content shifts density; pick the correct milk/cream/fat level if variants exist.
For cheese, shredded vs grated vs cubed changes volume—prefer grams.
Does fat percentage matter?Yes. A cup of heavy cream is heavier than milk; swapping without weight alters richness and texture.
FAQ
Does low-fat yogurt weigh the same as whole milk yogurt per cup?
Yes. Both types measure at 1.036 g/ml, yielding approximately 245 g per cup. The fat reduction from ~3.5% (whole milk) to 1–2% (low-fat) does not produce a measurable density difference. For gram-weight purposes, plain low-fat and plain whole milk yogurt are interchangeable.
How does plain low-fat yogurt compare to sour cream in terms of weight per cup?
Plain low-fat yogurt (1.036 g/ml, ~245 g/cup) is slightly heavier than full-fat sour cream (0.972 g/ml, ~230 g/cup) — about 15 g more per cup. The difference is due to sour cream's higher fat content. When substituting yogurt for sour cream in a recipe, expect a marginal weight difference and a less rich, more tangy result.