How many grams in a cup of water?
1 cup of water weighs 237 g.1 tablespoon: 15 g1 teaspoon: 4.9 g
Weights are for water (liquid), in US customary cups.
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= 237 g
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Cups to grams
| Cups | Grams |
|---|---|
| ⅛ cup | 30 g |
| ¼ cup | 59 g |
| ⅓ cup | 79 g |
| ½ cup | 119 g |
| ⅔ cup | 158 g |
| ¾ cup | 178 g |
| 1 cup | 237 g |
| 1 ½ cups | 356 g |
| 2 cups | 474 g |
| 3 cups | 711 g |
Grams to cups
| Grams | US measure |
|---|---|
| 25 g | ≈ 1 tbsp + 2 tsp |
| 50 g | ≈ 3 tbsp + 1 tsp |
| 100 g | ≈ ¼ cup + 3 tbsp |
| 150 g | ≈ ⅝ cup |
| 200 g | ≈ ⅞ cup |
| 250 g | 1 cup + 1 tbsp |
| 500 g | 2 ⅛ cups |
| 1,000 g | 4 ¼ cups |
Rounded to amounts you can measure; ≈ marks a rounded answer.
Measuring water
One US cup is 8 fluid ounces, about 237 ml. Water weighs about 1 g per ml, so for water, milliliters and grams are nearly the same.
These weights are for water (liquid). A different form, or a cup filled another way, weighs differently, so weigh it if the recipe gives grams.
Source
USDA FoodData Central, food 173647: “Beverages, water, tap, drinking”, 1 cup, serving 8 fl oz = 237 g (USDA FoodData Central SR Legacy, April 2018). Other amounts are calculated with 1 cup = 16 tablespoons = 48 teaspoons. Data version 2026-10-17.1, reviewed 17 October 2026.
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