Greek Yogurt Calories: Nutrition Facts by Type and Serving
USDA-sourced calorie data for plain Greek yogurt by fat content and serving size, with protein comparisons.
Plain Greek yogurt doesn't have a single matching tested recipe on this site — the closest match, our Greek Yogurt Protein Pancakes, is a baked dish rather than plain yogurt, so it wouldn't give an accurate 'plain yogurt' calorie figure. For plain Greek yogurt itself, this guide uses USDA FoodData Central reference values, which are the standard, verifiable source for a single-ingredient food like this. The number varies significantly by fat content — nonfat, low-fat, and full-fat versions are genuinely different foods calorically.
At a Glance
Per USDA FoodData Central reference data, plain nonfat Greek yogurt is approximately 100 calories per 170g (6 oz) serving, with about 17g protein, 6g carbohydrate, and 0.7g fat. Plain low-fat (2%) Greek yogurt is approximately 146 calories for the same 170g serving, with about 20g protein, 8g carbohydrate, and 3.8g fat. Plain full-fat Greek yogurt is approximately 190 calories for 170g, with about 17g protein, 8g carbohydrate, and 10g fat. Protein stays fairly consistent across fat levels since Greek yogurt's straining process concentrates protein regardless of fat content.
Why the Number Varies
Fat content (nonfat, low-fat, full-fat) is the primary driver of calorie differences, since fat carries more than twice the calories per gram of protein or carbohydrate. Straining process is the second factor — Greek yogurt is strained to remove whey, which concentrates protein and reduces carbohydrate compared to regular unstrained yogurt of the same fat level; this is why Greek yogurt reads as more protein-dense than a standard yogurt at a similar calorie count. Added sugar is the third and often-overlooked factor: flavored Greek yogurts frequently add 10-15g of sugar per serving, which can add 40-60 calories compared to plain, unsweetened yogurt.
Portion Size: How the Calories Scale
Using USDA data for plain nonfat Greek yogurt (100 calories per 170g) as the baseline: a small serving (100g, about 2/3 cup): approximately 59 calories. A standard serving (170g, a typical single-serving container): 100 calories. A large breakfast bowl portion (250g): approximately 147 calories. Full-fat Greek yogurt at the same 250g portion: approximately 279 calories — nearly double the nonfat version at the same weight, illustrating how much fat content matters.
💡 Tip: Check the label on flavored Greek yogurt cups specifically — many popular flavored varieties add 12-15g of sugar per serving, which can turn a 100-calorie plain yogurt into a 150-160 calorie flavored one.
How Greek Yogurt Fits Your Goals
Plain nonfat Greek yogurt (100 calories, 17g protein per 170g) is one of the most protein-dense, calorie-light foods available and fits extremely well into a calorie deficit, particularly as a high-protein snack or breakfast base. Full-fat Greek yogurt fits a keto or low-carb approach better than nonfat, since the higher fat content and unchanged protein level align with keto macros, while nonfat yogurt's higher relative carb percentage makes it less ideal for strict keto. For diabetic eating, plain (unsweetened) Greek yogurt of any fat level has a relatively gentle blood sugar impact due to its protein and modest carb content — flavored varieties with added sugar are the ones to watch.
Calculate Your Exact Portion
Since Greek yogurt's calorie count depends heavily on fat content and any added flavoring or toppings, use our portion calculator to scale the USDA reference values above to your exact serving size and fat percentage, whether you're eating a small snack portion or a full breakfast bowl with toppings.
A Lighter Version, If You Want One
The most direct calorie reduction for Greek yogurt is choosing nonfat or low-fat over full-fat, since protein stays roughly consistent across fat levels while calories nearly double from nonfat to full-fat at the same serving weight. Choosing plain yogurt and adding your own fresh fruit or a small drizzle of honey, rather than buying pre-flavored yogurt, lets you control the added sugar directly instead of accepting a manufacturer's often-generous sweetening.
Frequently Asked Questions
How many calories are in Greek yogurt?
Per USDA reference data, a standard 170g (6 oz) serving of plain nonfat Greek yogurt is approximately 100 calories with 17g of protein. Low-fat is about 146 calories and full-fat is about 190 calories for the same serving size, since fat content is the main variable.
Is Greek yogurt healthy?
Yes — plain Greek yogurt is one of the more protein-dense, nutritionally efficient dairy foods available, providing calcium, probiotics, and significant protein for a relatively modest calorie count. Flavored varieties with added sugar are less nutritionally efficient, since the added sugar contributes calories without added protein.
Is Greek yogurt good for weight loss?
Yes, particularly plain nonfat or low-fat versions — 17-20g of protein for around 100-146 calories makes it one of the more efficient high-protein, moderate-calorie foods for supporting a calorie deficit while staying full. Choosing plain over flavored avoids the added sugar found in many popular flavored cups.
How much protein is in Greek yogurt compared to regular yogurt?
Greek yogurt's straining process removes whey and concentrates protein, giving it roughly 15-20g of protein per 170g serving compared to about 8-9g for the same serving of regular, unstrained yogurt — nearly double, for a similar or only modestly higher calorie count.
Plain Greek yogurt's calorie count ranges from about 100 calories (nonfat) to 190 calories (full-fat) per standard 170g serving, per USDA reference data, with protein staying fairly consistent across fat levels at 17-20g. It's one of the more genuinely protein-efficient foods for its calorie cost, making fat-level choice — not portion size alone — the main decision point for fitting it into your goals.
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