Conversion Table: Water Cups to Grams
| Volume | Grams | Ounces |
|---|---|---|
| 1 tsp | 4.9 g | 0.17 oz |
| 1 tbsp | 14.8 g | 0.52 oz |
| ⅛ cup | 29.6 g | 1.04 oz |
| ¼ cup | 59.3 g | 2.09 oz |
| ⅓ cup | 79.0 g | 2.79 oz |
| ½ cup | 118.5 g | 4.18 oz |
| ⅔ cup | 158.0 g | 5.57 oz |
| ¾ cup | 177.8 g | 6.27 oz |
| 1 cup | 237.0 g | 8.36 oz |
| 2 cups | 474.0 g | 16.72 oz |
| 4 cups | 948.0 g | 33.44 oz |
How to Measure Water
Measure liquids in a liquid measuring cup (Pyrex-style) at eye level on a flat surface.
For the most consistent results, use a kitchen scale. A cup measurement can vary by 15–30% depending on technique. Weighing eliminates that variable entirely.
Why the Gram Weight Varies by Ingredient
A cup is a measure of volume — how much space something occupies. Water has a specific density (mass per unit volume) that determines how many grams fit in that space. The 237 g/cup value above is calibrated for the measuring method described (spoon and level where applicable).
Different ingredients have very different densities. Compare: water (237 g/cup), honey (340 g/cup), cake flour (96 g/cup). Using a single generic "cups to grams" ratio doesn't work — the ingredient must be specified.
Quick Converter
For more conversions, use our full cups to grams calculator which covers 89+ ingredients.
Frequently Asked Questions
How many grams is ½ cup of Water?
118.5 grams (4.18 oz).
How many grams is ¼ cup of Water?
59.3 grams (2.09 oz).
Is this weight for sifted or unsifted Water?
Measurements use the standard technique for this ingredient. See the measuring note above.
Where does this weight come from?
Source: USDA FoodData Central. See our methodology page for how we source and verify ingredient weights.