Water, Cups to Grams & Grams to Cups
1 cup of water = 237 grams · 100g = 0.42 cups
Water is the reference against which other liquid densities are judged: one US cup is 236.6 millilitres and weighs almost exactly 236–237 grams, since a millilitre of water weighs a gram. That one-to-one relationship is why water is the simplest conversion in the kitchen. Most thin liquids — broth, juice, coffee — are within a few percent of it.
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Water cups to grams table
| Cups | Grams | Ounces | Tablespoons |
|---|---|---|---|
| 1/8 | 29.6 g | 1.04 oz | 2 |
| 1/4 | 59.2 g | 2.09 oz | 4 |
| 1/3 | 78.9 g | 2.78 oz | 5.33 |
| 1/2 | 118 g | 4.18 oz | 8 |
| 2/3 | 158 g | 5.58 oz | 10.7 |
| 3/4 | 178 g | 6.27 oz | 12 |
| 1 | 237 g | 8.36 oz | 16 |
| 1 1/2 | 356 g | 12.5 oz | 24 |
| 2 | 474 g | 16.7 oz | 32 |
| 3 | 711 g | 25.1 oz | 48 |
Water grams to cups table
Working the other way? Here's how many cups common gram weights of water come to, handy when a recipe lists water in grams but you only have cup measures.
| Grams | Cups | Ounces | Tablespoons |
|---|---|---|---|
| 25 g | 0.11 | 0.88 oz | 1.69 |
| 50 g | 0.21 | 1.76 oz | 3.38 |
| 75 g | 0.32 | 2.65 oz | 5.06 |
| 100 g | 0.42 | 3.53 oz | 6.75 |
| 125 g | 0.53 | 4.41 oz | 8.44 |
| 150 g | 0.63 | 5.29 oz | 10.1 |
| 175 g | 0.74 | 6.17 oz | 11.8 |
| 200 g | 0.84 | 7.05 oz | 13.5 |
| 225 g | 0.95 | 7.94 oz | 15.2 |
| 250 g | 1.05 | 8.82 oz | 16.9 |
| 300 g | 1.27 | 10.6 oz | 20.3 |
| 350 g | 1.48 | 12.3 oz | 23.6 |
| 400 g | 1.69 | 14.1 oz | 27 |
| 500 g | 2.11 | 17.6 oz | 33.8 |
Water: US, metric & UK cups compared
A “cup” isn’t the same size everywhere, so 1 cup of water weighs a different number of grams depending on which cup your recipe uses. The US cup is 236.6 ml, while Australia, New Zealand, Canada and modern UK recipes use a 250 ml metric cup. Here’s 1 cup of water in each:
| Cup standard | Size | 1 cup water | Used in |
|---|---|---|---|
| US cup | 237 ml | 237 g | United States (most US recipe sites) |
| Metric cup | 250 ml | 250 g | Australia, NZ, Canada & modern UK |
| UK imperial cup | 284 ml | 285 g | Older British recipes |
| Japanese cup | 200 ml | 200 g | Japan |
Unless a recipe says otherwise, US recipes mean the US cup and Australian/UK recipes mean the 250 ml metric cup. The tables higher up this page use the US cup.
Related ingredients
Quick reference: Water in grams
- ⅛ cup water = 29.6g
- ¼ cup water = 59.2g
- ⅓ cup water = 78.9g
- ½ cup water = 118g
- ⅔ cup water = 158g
- ¾ cup water = 178g
- 1 cup water = 237g
- 2 cups water = 474g
How many cups is 100g, 200g or 300g of water?
Because one cup of water weighs about 237 grams, you can convert any weight to cups by dividing by 237. So 100g of water is about 0.42 cups, 200g is about 0.84 cups, 250g is about 1.05 cups, and 300g is about 1.27 cups. For any other amount, type the grams straight into the converter above and switch it to show cups.
How to measure water accurately
For the most reliable baking results, weigh water on a kitchen scale rather than scooping by volume. One US cup of water weighs about 237 grams (8.36 oz), but the exact figure changes with how tightly it's packed and the brand. Scooping straight from the bag compacts water and can leave you 15 to 20% over, so spoon it into the cup and level it off for the closest match to the figures above. Use the tables for quick reference, or the converter for any custom amount in cups, grams, ounces or tablespoons.
Tip: Remember that 1ml of water = 1g, so any water measurement in millilitres is essentially the same number in grams.
Water conversions: common questions
How many grams are in a cup of water?
One US cup of water weighs approximately 237 grams (8.36 oz).
How many grams in half a cup of water?
Half a cup (½ cup) of water weighs approximately 118 grams.
How many grams in a quarter cup of water?
A quarter cup (¼ cup) of water weighs approximately 59.2 grams.
How do I convert water from cups to grams?
Multiply the number of cups by 237. For example, 2 cups of water = 474 grams, and ¾ cup = 178 grams.
How many cups is 100g of water?
100 grams of water is about 0.42 cups. 200g is about 0.84 cups and 300g is about 1.27 cups, since 1 cup weighs 237 grams.
How many grams in a metric (Australian) cup of water?
One 250 ml metric cup of water, used in Australia, New Zealand, Canada and modern UK recipes, weighs about 250 grams, compared with 237 grams for a 236.6 ml US cup.