One cup (245g) of plain nonfat Greek yogurt has 100 calories, 17.3g of protein, 5.7g of carbs, and 0.7g of fat (USDA). That's one of the best protein-to-calorie ratios of any food — 17 grams of protein for the calorie cost of a single tablespoon of olive oil. If you're losing weight and need to hit your protein target, Greek yogurt is hard to beat.
Greek Yogurt Calories by Type
Fat content changes the numbers significantly. USDA FoodData Central values for 1 cup (245g) of plain Greek yogurt:
| Type | Calories | Protein | Fat | Carbs | Sugar |
|---|---|---|---|---|---|
| Nonfat (0%) | 100 | 17.3g | 0.7g | 5.7g | 5.3g |
| Low-fat (2%) | 163 | 15.3g | 4.5g | 7.8g | 7.3g |
| Whole milk (5%) | 220 | 14.4g | 11.0g | 8.2g | 7.5g |
Nonfat is the clear winner for weight loss — 100 calories with the highest protein. Whole milk Greek yogurt is still a good food, but at 220 calories you're paying more than double for less protein. If you're in a calorie deficit, nonfat is the obvious choice.
Greek Yogurt vs Regular Yogurt
Greek yogurt is strained to remove whey, which concentrates the protein and reduces sugar. The difference is dramatic:
| Greek Yogurt (nonfat, 1 cup) | Regular Yogurt (nonfat, 1 cup) | |
|---|---|---|
| Calories | 100 | 137 |
| Protein | 17.3g | 14.0g |
| Sugar | 5.3g | 18.8g |
| Fat | 0.7g | 0.4g |
Greek yogurt has 24% more protein and 72% less sugar than regular yogurt — for fewer calories. Regular yogurt isn't bad, but if you're choosing between the two for weight loss, Greek wins on every metric that matters.
The Flavored Yogurt Trap
Plain Greek yogurt: 100 calories, 5g sugar. Flavored Greek yogurt: 150–180 calories, 15–20g sugar. The flavor comes from added sugar — sometimes 3–4 teaspoons per container.
Common flavored varieties per single-serve container (~150g):
| Flavor | Calories | Sugar | Protein |
|---|---|---|---|
| Plain nonfat | 61 | 3.2g | 10.6g |
| Strawberry (nonfat) | 107 | 12.0g | 10.0g |
| Vanilla (nonfat) | 115 | 14.0g | 10.0g |
| Honey (nonfat) | 125 | 16.0g | 10.0g |
The protein stays similar, but you're paying an extra 45–65 calories in pure sugar. A smarter approach: buy plain and add your own toppings. A handful of berries (25 cal) or a teaspoon of honey (20 cal) gives you flavor for half the calories of the pre-flavored version. Check the label — look for "added sugars" specifically.
Best Ways to Use Greek Yogurt for Weight Loss
Greek yogurt is one of the most versatile diet foods:
- Breakfast bowl: 1 cup nonfat Greek yogurt + ½ cup berries + 1 tbsp granola = ~175 cal, 18g protein
- Smoothie base: Replace milk with Greek yogurt for a thicker, higher-protein smoothie
- Sour cream substitute: On baked potatoes, tacos, and chili — saves 40+ calories per serving and adds protein
- Protein boost for oatmeal: Stir 2–3 tablespoons into cooked oatmeal for creaminess + extra protein
- Snack with fruit: 1 cup + sliced banana = 205 cal, 18g protein — holds you 3–4 hours
- Sauce base: Mix with lemon juice, garlic, and dill for a 30-calorie dressing
Track how Greek yogurt fits your daily targets with our macro calculator.
Frozen Greek Yogurt vs Ice Cream
| Frozen Greek Yogurt (½ cup) | Vanilla Ice Cream (½ cup) | |
|---|---|---|
| Calories | 100–120 | 137 |
| Protein | 4–6g | 2.3g |
| Sugar | 14–18g | 14.0g |
| Fat | 0–3g | 7.3g |
Frozen Greek yogurt saves some calories and adds protein compared to ice cream. But it's not the same as regular Greek yogurt — the sugar content jumps to match ice cream levels. It's a better dessert choice, but don't confuse it with the protein-packed plain version.
How Much Greek Yogurt Should You Eat Daily?
There's no upper limit for healthy adults, but 1–2 cups per day is practical and covers a significant chunk of your protein needs. Two cups of nonfat Greek yogurt delivers 34g of protein for 200 calories — that's about 25–40% of most people's daily protein target on a weight loss diet.
Greek yogurt also provides probiotics (gut health), calcium (bone density during weight loss), and B12. It's one of the few foods where eating more of it genuinely makes your diet better.
Full Nutrition: Nonfat Greek Yogurt per 100g
| Nutrient | Amount |
|---|---|
| Calories | 59 kcal |
| Protein | 10.2g |
| Total fat | 0.4g |
| Carbohydrates | 3.6g |
| Sugar | 3.2g |
| Calcium | 115mg (11% DV) |
| Vitamin B12 | 0.75 µg (31% DV) |
| Phosphorus | 141mg (14% DV) |
Source: USDA FoodData Central. Greek yogurt, plain, nonfat.
