Sugar serving size, cups to grams
Here a serving of sugar is counted as 1 teaspoon, which USDA weighs at 4 g, with 15 calories and 0 g protein. One cup weighs 6.6 oz (188 g).
Serving sizes of sugar
Every household measure USDA weighs for this food, plus 1 oz and 100 g.
| Measure | Weight | Calories | Protein | Carbs | Fat |
|---|---|---|---|---|---|
| 1 cup | 6.6 oz (188 g) | 724 calories | 0 g | 187.2 g | 0.6 g |
| 1 teaspoon | 4 g | 15 calories | 0 g | 4 g | 0.01 g |
| 1 oz | 1 oz (28 g) | 109 calories | 0 g | 28.2 g | 0.09 g |
| 100 g | 3.5 oz (100 g) | 385 calories | 0 g | 99.6 g | 0.32 g |
Cups to grams
USDA weighs 1 cup of sugar at 188 g. Smaller measures follow from it (1 cup = 16 tbsp = 48 tsp).
| Measure | Weight | Calories |
|---|---|---|
| 1 cup | 6.6 oz (188 g) | 724 calories |
| 3/4 cup | 5 oz (141 g) | 543 calories |
| 2/3 cup | 4.4 oz (125 g) | 483 calories |
| 1/2 cup | 3.3 oz (94 g) | 362 calories |
| 1/3 cup | 2.2 oz (63 g) | 241 calories |
| 1/4 cup | 1.7 oz (47 g) | 181 calories |
| 1 tbsp | 11.8 g | 45 calories |
| 1 tsp | 3.9 g | 15 calories |
Grams and ounces to cups
| Weight | Volume | Calories |
|---|---|---|
| 1 oz | 2.4 tbsp | 109 calories |
| 100 g (3.5 oz) | 1/2 cup | 385 calories |
| 1 lb (454 g) | 2 1/3 cups | 1746 calories |
What 100 g of sugar looks like
100 g of sugar is 3.5 oz, or about 1/2 cup. It has 385 calories, 0 g protein, 99.6 g carbs and 0.32 g fat.
Keep exploring
Sources
Weights and nutrition: USDA FoodData Central, food portions and nutrients (FoodData Central, April 2026 release, accessed 2026-10-13)
- Sugars (granulated): Sugars, granulated, FDC ID 746784 (Foundation Foods, published 2019-12-16)
- Kitchen measures (1 cup = 16 tbsp, 1 tbsp = 3 tsp): NDSU Extension, Ingredient Substitutions (FN198, J. Garden-Robinson, April 2013 edition). https://www.extension.purdue.edu/extmedia/HHS/HHS-784-W.pdf (accessed 2026-10-12)
How we calculate: each household measure is the gram weight USDA lists for this food. Calories and nutrients are the USDA values per 3.5 oz (100 g) scaled to that weight. 1 oz = 28.35 g and 1 lb = 453.6 g. Cup fractions are rounded to the nearest kitchen measure. A dash (—) means USDA reports no value. How we verify.