Water: Cups to Grams
One US cup (240 ml) of water weighs about 240 grams, based on its typical kitchen density. Convert any amount below, or use the reference table for common cup fractions.
1 cup=240 g
Based on water at 240 g per US cup.
Water conversion table
| Cups | Grams | Millilitres | Tablespoons | Ounces |
|---|---|---|---|---|
| 1/4 cup | 60 g | 60 ml | 4 tbsp | 2.12 oz |
| 1/3 cup | 80 g | 80 ml | 5.33 tbsp | 2.82 oz |
| 1/2 cup | 120 g | 120 ml | 8 tbsp | 4.23 oz |
| 2/3 cup | 160 g | 160 ml | 10.7 tbsp | 5.64 oz |
| 3/4 cup | 180 g | 180 ml | 12 tbsp | 6.35 oz |
| 1 cup | 240 g | 240 ml | 16 tbsp | 8.47 oz |
| 1 1/2 cups | 360 g | 360 ml | 24 tbsp | 12.7 oz |
| 2 cups | 480 g | 480 ml | 32 tbsp | 16.9 oz |
| 2 1/2 cups | 600 g | 600 ml | 40 tbsp | 21.2 oz |
| 3 cups | 720 g | 720 ml | 48 tbsp | 25.4 oz |
In grams, 1/4 cup of water is about 60 g, 1/3 cup is about 80 g, 1/2 cup is about 120 g, 2/3 cup is about 160 g, 3/4 cup is about 180 g, 1 cup is about 240 g, 1 1/2 cups is about 360 g, 2 cups is about 480 g and 3 cups is about 720 g.
A tablespoon of water is about 15 grams, and a teaspoon is about 5 grams.
About measuring water
Water is the reference point for every other conversion, because by definition one millilitre of water weighs one gram. One US cup is 240 millilitres, so a cup of water weighs about 240 grams. Every other ingredient is measured against this benchmark: flour is far lighter for the same volume, honey much heavier. When you want to sanity check a conversion, comparing it to water is the quickest gut check there is.
Water is the benchmark: 1 millilitre weighs 1 gram, so a US cup is about 240 grams.
Frequently asked questions
How many grams is 1 cup of water?
One US cup of water is about 240 grams, because a US cup is 240 millilitres and one millilitre of water weighs one gram.
Is a cup of water the same as 250 ml?
Not quite. A US cup is 240 ml, while a metric cup is 250 ml. The 10 ml difference is worth knowing when you follow recipes from different countries.
How many grams is a tablespoon of water?
About 15 grams, since a US tablespoon is 15 millilitres and water weighs one gram per millilitre.