1 cup water in grams and mL
A US cup of water weighs 236.2 grams: type grams, cups or milliliters and get the others.
236.2 g water
1 cup
- 1 cup×1
US cup of 236.6 mL
How this is measured
1 US cup of water weighs 236.2 g. Based on the NIST Chemistry WebBook density of water at 20 °C. Water at 20 °C.
Other values: Water at 25 °C, 235.9 g a cup: 1 cup (Warmer water is slightly less dense (NIST Chemistry WebBook)); King Arthur, water, 227 g a cup: 1.04 cups (King Arthur lists 227 g (8 oz) for a cup of water and does not say why it is lower).
How many grams in 1 cup of water?
One US cup of water weighs 236.2 grams, or 8.33 ounces. The US cup is 236.6 milliliters (NIST Handbook 44), and water at room temperature, 20 °C, weighs 0.998 grams per milliliter (NIST Chemistry WebBook). So 1 mL of water is almost exactly 1 gram, and a cup of water in grams is a little under its milliliters.
Two cups of water weigh 472.4 grams, a tablespoon 14.76 grams and a teaspoon 4.92 grams.
Water cups to grams, milliliters and fluid ounces
US cup fractions of water in grams, with milliliters and fluid ounces, which are exact by definition:
| Cups | Grams | Milliliters | Fluid ounces |
|---|---|---|---|
| ⅛ cup | 29.52 g | 29.57 mL | 1 fl oz |
| ¼ cup | 59.05 g | 59.15 mL | 2 fl oz |
| ⅓ cup | 78.73 g | 78.86 mL | 2.67 fl oz |
| ½ cup | 118.1 g | 118.3 mL | 4 fl oz |
| ⅔ cup | 157.5 g | 157.7 mL | 5.33 fl oz |
| ¾ cup | 177.1 g | 177.4 mL | 6 fl oz |
| 1 cup | 236.2 g | 236.6 mL | 8 fl oz |
| 1½ cups | 354.3 g | 354.9 mL | 12 fl oz |
| 2 cups | 472.4 g | 473.2 mL | 16 fl oz |
| 3 cups | 708.6 g | 709.8 mL | 24 fl oz |
| 4 cups | 944.8 g | 946.4 mL | 32 fl oz |
Water grams to cups chart
Gram amounts of water as the cups and spoons to measure:
US cups, as the cups and spoons to fill; ≈ marks the nearest measure.
| Grams | Water |
|---|---|
| 30 g | ≈ 2 tbsp |
| 50 g | ≈ 3 tbsp + 1 tsp |
| 59 g | ≈ ¼ cup |
| 100 g | ≈ ⅓ cup + 1 tbsp + 1 tsp |
| 118 g | ≈ ½ cup |
| 125 g | ≈ ½ cup + 1 tsp |
| 200 g | ≈ ⅔ cup + 3 tbsp |
| 236 g | ≈ 1 cup |
| 250 g | ≈ 1 cup + 1 tbsp |
| 300 g | ≈ 1¼ cups |
| 473 g | ≈ 2 cups |
| 500 g | ≈ 2 cups + 2 tbsp |
| 1000 g | ≈ 4¼ cups |
Measuring water: kitchen scale or measuring cup
For water, a kitchen scale and a liquid measuring cup give nearly the same amount: because 1 mL weighs about 1 gram, set the scale to grams and pour to the milliliters the recipe asks for. 500 mL of water weighs 499.2 grams, and 1 liter weighs 998.4 grams. Grams to milliliters works only this simply for water; other liquids weigh more or less per milliliter, as the mL to grams converter shows.
Is 1 cup of water 250 grams?
Only in a metric cup. A metric cup is 250 mL, so it holds 249.6 grams of water. The US cup is smaller: 236.6 milliliters, or 236.2 grams of water. The converter's cup setting switches between the US, label, metric and imperial cups; the cups to mL converter compares them.
Water temperature and other charts
Water gets slightly lighter as it warms: at 25 °C a US cup holds 235.9 grams (NIST Chemistry WebBook). That is less than half a gram per cup. King Arthur Baking's chart lists 227 grams (8 ounces) for a cup of water and does not say why it is lower:
Our value is the one the converter uses; the others are what other sources list for a US cup.
| Listed by | Grams in 1 US cup | Ounces | Source |
|---|---|---|---|
| NISTOur value | 236.2 g | 8.33 oz | E |
| Water at 25 °C | 235.9 g | 8.32 oz | E |
| King Arthur, water | 227 g | 8.01 oz | A |
Sources: A — King Arthur Baking ingredient weight chart; E — NIST Chemistry WebBook (Standard Reference Database 69), water.
Questions
How much is in 1 cup of water?
A US cup holds 236.6 milliliters, or 8 fluid ounces, of water, which weighs 236.2 grams.
Is 250 mL equal to 1 cup?
It is one metric cup. In US cups, 250 mL is ≈ 1 cup + 1 tbsp.
Is 100 grams of water equal to 1 cup?
No: 100 grams of water is ≈ ⅓ cup + 1 tbsp + 1 tsp. A cup of water is 236.2 grams.
How many grams is ½ cup of water?
118.1 grams. ¼ cup is 59.05 grams and ¾ cup 177.1 grams.
How many cups is 1 liter of water?
≈ 4¼ cups US cups.
Does 1 mL of water weigh 1 gram?
Very nearly: 998.4 grams per liter at 20 °C, so 1 mL weighs 0.998 grams.
Sources
- 21 CFR 101.9 (US nutrition labeling)
- King Arthur Baking ingredient weight chart
- NIST Chemistry WebBook (Standard Reference Database 69), water
- NIST Handbook 44, Appendix C
- NIST Special Publication 430, Household Weights and Measures
- USDA FoodData Central, SR Legacy
- Weights and Measures Act 1985 (UK), Schedule 1
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