1 Cup Water in Grams
1 cup of water weighs:
240 g
US cup (240 ml)
250 g
Metric / AU cup (250 ml)
American recipes mean the 240 ml cup; Australian, British and New Zealand recipes mean the 250 ml metric cup. If the recipe does not say, the cuisine usually tells you — see the full cups to grams guide.
Water is the one ingredient where volume and weight line up exactly: 1 ml of water weighs 1 g. A US cup is 240 ml, so a cup of water is 240 g. This is why a kitchen scale doubles as a measuring jug for any thin liquid.
Water cup to gram chart
| Cups | US (240 ml) | Metric (250 ml) |
|---|---|---|
| ¼ cup | 60 g | 63 g |
| ⅓ cup | 80 g | 83 g |
| ½ cup | 120 g | 125 g |
| ⅔ cup | 160 g | 167 g |
| ¾ cup | 180 g | 188 g |
| 1 cup | 240 g | 250 g |
| 1½ cups | 360 g | 375 g |
| 2 cups | 480 g | 500 g |
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= 125 g
Frequently asked questions
How many grams is 1 cup of water?
1 US cup of water is 240 g. In an Australian, UK or NZ metric cup (250 ml) it is 250 g. Weighing is more accurate than measuring by volume.
How many grams is half a cup of water?
Half a US cup of water is 120 g, and three-quarters of a cup is 180 g.
Is 1 cup of water 250 g?
It depends on the cup. A US cup (240 ml) of water is 240 g. An Australian, UK or NZ metric cup is 250 ml, so a cup of water there is exactly 250 g.
Can I weigh liquids instead of measuring them?
Yes, and it is more accurate. For water, milk, stock and other thin liquids, put the jug on a scale, zero it, and pour to the gram figure. There is no meniscus to read and nothing to level.
Do other liquids weigh the same as water?
Not quite. Milk is slightly heavier at about 240 g per cup, oil is lighter at about 218 g, and honey is much heavier at 340 g. Only water is exactly 1 g per ml.