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Water — Cups to Grams

One US cup of water weighs about 237 grams. That makes it heavier than all-purpose flour, which is 120 grams per cup. Water is the reference point for all conversions — one US cup is almost exactly 237 grams. Use the converter below to switch water between cups, grams, ounces, tablespoons and millilitres — or read the full chart underneath.

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Water conversion chart

Water — cups to grams chart
Cups	Grams	Ounces	Tablespoons	Millilitres
⅛ cup	29.63 g	1.04 oz	2	29.57 ml
¼ cup	59.25 g	2.09 oz	4	59.15 ml
⅓ cup	79 g	2.79 oz	5.33	78.86 ml
½ cup	118.5 g	4.18 oz	8	118.3 ml
⅔ cup	158 g	5.57 oz	10.67	157.7 ml
¾ cup	177.8 g	6.27 oz	12	177.4 ml
1 cup	237 g	8.36 oz	16	236.6 ml
1¼ cups	296.3 g	10.45 oz	20	295.7 ml
1½ cups	355.5 g	12.54 oz	24	354.9 ml
2 cups	474 g	16.72 oz	32	473.2 ml
3 cups	711 g	25.08 oz	48	709.8 ml

Grams to cups: water

Water — grams to cups chart
Grams	Cups	Ounces	Tablespoons
10 g	0.042	0.353 oz	0.675
25 g	0.105	0.882 oz	1.69
50 g	0.211	1.76 oz	3.38
75 g	0.316	2.65 oz	5.06
100 g	0.422	3.53 oz	6.75
125 g	0.527	4.41 oz	8.44
150 g	0.633	5.29 oz	10.13
200 g	0.844	7.05 oz	13.5
250 g	1.05	8.82 oz	16.88
300 g	1.27	10.58 oz	20.25
400 g	1.69	14.11 oz	27
500 g	2.11	17.64 oz	33.76

How to measure water

Water is the reference point for all conversions — one US cup is almost exactly 237 grams.

Because a cup measures volume rather than weight, the most reliable way to measure water is with a digital kitchen scale. If you are working from cups, keep your technique consistent every time so your results are repeatable. For more, see our guide on baking by weight versus volume.

No scale yet? You don't need a fancy one; any digital kitchen scale that reads in 1-gram steps does everything on this site. Well-rated kitchen scales on Amazon →

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Water conversions: FAQ

Why doesn't a cup of water weigh the same as a cup of water?

A cup measures volume, not weight. Water is less dense than water (237 g versus 237 g per cup), so the same volume has a different weight. Weighing in grams is the most accurate way to measure it.

Common water conversions

Quick-answer pages for the conversions people search for most.

100 g to cups

100 g water ≈ 0.422 cups

200 g to cups

200 g water ≈ 0.844 cups

250 g to cups

250 g water ≈ 1.05 cups

500 g to cups

500 g water ≈ 2.11 cups

¼ cup to grams

¼ cup water ≈ 59.25 g

½ cup to grams

½ cup water ≈ 118.5 g

Related converters

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* Conversion figures are typical average weights for one US customary cup (236.6 ml), based on the King Arthur Baking Ingredient Weight Chart and cross-referenced with the U.S. Department of Agriculture FoodData Central database. Actual weight varies with packing, brand and humidity — see our methodology.