Ingredient Weight Converter · liquid
Water: cups to grams
1 cup of water weighs 240 grams. Use the converter below for any other amount, or check the quick-reference table.
Water baseline: 1 cup = 240 g.
Common amounts
| Cups | Tablespoons | Grams | Ounces (weight) | Milliliters |
|---|---|---|---|---|
| 1/4 cup | 4.0 | 60 g | 2.12 oz | 59 mL |
| 1/3 cup | 5.3 | 80 g | 2.82 oz | 79 mL |
| 1/2 cup | 8.0 | 120 g | 4.23 oz | 118 mL |
| 2/3 cup | 10.7 | 160 g | 5.65 oz | 158 mL |
| 3/4 cup | 12.0 | 180 g | 6.35 oz | 177 mL |
| 1 cup | 16.0 | 240 g | 8.47 oz | 237 mL |
| 1.5 cups | 24.0 | 360 g | 12.70 oz | 355 mL |
| 2 cups | 32.0 | 480 g | 16.93 oz | 473 mL |
| 3 cups | 48.0 | 720 g | 25.40 oz | 710 mL |
| 4 cups | 64.0 | 960 g | 33.86 oz | 946 mL |
Why measuring water by cup goes wrong
Water is the reference standard: one milliliter is one gram, by definition. A US cup is 236.588 mL, so technically a cup of water weighs 236.588 g. Most recipes round to 240 g/cup, which is close enough that the 1.4 percent difference disappears into measurement error.
Practical tips for working with water
Tap water versus filtered water rarely matters in baking. The exception is sourdough — heavily chlorinated tap water can suppress the wild yeast and bacteria in a young starter. If your tap water smells like a swimming pool, let it sit uncovered for 30 minutes before using; chlorine evaporates. Bottled spring water also works, but for most home bakers, plain tap is fine.
Note from this ingredient's record: Room-temperature water. One mL of water weighs one gram, but a US cup is 236.588 mL — most recipe writers round to 240 g for the reader's sanity.
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