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Water: cups to grams
1 cup of water = 237 grams (8.3 oz). 1 tablespoon = 15 g, 1 teaspoon = 4.9 g. Measured: 1 US cup is 236.59 mL; water weighs about 1 g per mL at room temperature.
Fractions work: 1/3, 1 1/2
Water cups to grams chart
| US cups | Grams | Ounces |
|---|---|---|
| 1/8 cup | 30 g | 1.0 oz |
| 1/4 cup | 59 g | 2.1 oz |
| 1/3 cup | 79 g | 2.8 oz |
| 1/2 cup | 118 g | 4.2 oz |
| 2/3 cup | 158 g | 5.6 oz |
| 3/4 cup | 177 g | 6.3 oz |
| 1 cup | 237 g | 8.3 oz |
| 1 1/2 cups | 355 g | 12.5 oz |
| 2 cups | 473 g | 16.7 oz |
| 3 cups | 710 g | 25.0 oz |
| 4 cups | 946 g | 33.4 oz |
Tablespoons and teaspoons
| Spoon measure | Grams |
|---|---|
| 1 teaspoon | 4.9 g |
| 2 teaspoons | 9.9 g |
| 1 tablespoon | 15 g |
| 2 tablespoons | 30 g |
| 3 tablespoons | 44 g |
| 4 tablespoons (1/4 cup) | 59 g |
Water grams to cups
| Grams | US cups (decimal) | Closest kitchen measure |
|---|---|---|
| 25 g | 0.11 | 1.5 tbsp |
| 50 g | 0.21 | 3.5 tbsp |
| 100 g | 0.42 | 1/3 cup + 1.5 tbsp |
| 125 g | 0.53 | 1/2 cup + 0.5 tbsp |
| 150 g | 0.63 | 1/2 cup + 2 tbsp |
| 200 g | 0.85 | 3/4 cup + 1.5 tbsp |
| 250 g | 1.06 | 1 cup + 1 tbsp |
| 300 g | 1.27 | 1 1/4 cups + 0.5 tbsp |
| 400 g | 1.69 | 1 2/3 cups + 0.5 tbsp |
| 500 g | 2.11 | 2 cups + 2 tbsp |
| 750 g | 3.17 | 3 cups + 2.5 tbsp |
| 1000 g | 4.23 | 4 cups + 3.5 tbsp |
"Closest kitchen measure" rounds down to the nearest standard cup size, then makes up the rest in tablespoons, to the nearest half tablespoon.
Where this number comes from
The weight is taken from the USDA FoodData Central SR Legacy record "Water (density 1 g/mL)", portion "1 US cup = 236.6 mL" = 236.6 g. US cups are 236.59 mL. A metric cup (250 mL) holds about 250 g, and a UK imperial cup (284 mL) about 284 g.
Real kitchens vary. Brand, humidity, how finely something is ground and how hard you pack the cup can all move the weight by 5–15%. If a recipe author gives grams, use their number.