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CrumbCalc

How Many Grams in a Cup of Water?

1 cup of water weighs 237 grams. Every other measure is below, in both directions.

1 cup of water

237 g

≈ 8.36 oz

Data & method: This figure departs from the King Arthur chart; the source it uses instead is named under “Where this number comes from” below. An automated test pins the figure to that published source. How we calculate →

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Result

237 g

Water: 237 g per cup

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Water: cups to grams chart

Water Grams Ounces
¼ cup 59 g 2.09 oz
⅓ cup 79 g 2.79 oz
½ cup 119 g 4.18 oz
⅔ cup 158 g 5.57 oz
¾ cup 178 g 6.27 oz
1 cup 237 g 8.36 oz
1½ cups 356 g 12.54 oz
2 cups 474 g 16.72 oz
3 cups 711 g 25.08 oz
1 tablespoon 15 g 0.52 oz
1 teaspoon 4.9 g 0.17 oz

Grams to cups: water

Working the other way — a recipe in grams, and cups are what you have in the drawer:

Grams of water Cups (approx.)
50 g ¼ cup
100 g 0.42 cup
125 g ½ cup
200 g ⅚ cup
250 g 1.05 cups
500 g 2⅛ cups

Where this number comes from

Most of our weights are the King Arthur Baking chart figure, unchanged. This one is not, and it is worth saying why: Physical constant: water is 1.00 g/ml, so a 236.588 ml cup weighs 236.6 g. King Arthur's 227 g comes from reading 8 fl oz as 8 weight oz.

Every value we don't depart on is locked to the chart by a test, and each departure is pinned to the publication it names, so this list stays short and deliberate — you can read all of them on the methodology page.

Frequently Asked Questions

How many grams is 1 cup of water?

One US cup of water weighs 237 grams (about 8.36 ounces). Physical constant: water is 1.00 g/ml, so a 236.588 ml cup weighs 236.6 g. King Arthur's 227 g comes from reading 8 fl oz as 8 weight oz.

How many grams is a tablespoon of water?

A tablespoon of water is about 15 grams, since one cup holds 16 tablespoons. A teaspoon is about 4.9 grams.

How many cups is 250 g of water?

250 grams of water is about 1.05 cups (250 ÷ 237). Weighing is more reliable than measuring by cup.