Water — Grams & Cups Converter
1 cup of water weighs about 237 g. So 100 g ≈ 3/8 cup, 200 g ≈ 7/8 cup, and 300 g ≈ 1 1/4 cups. Convert any amount between grams, cups, ounces, tablespoons and millilitres with the calculator below.
💡 Tip: Water is the reference all densities compare to: 1 cup is about 237 g, and 1 ml of water weighs exactly 1 g.
Cups to grams chart for water
| Cups | Grams | Ounces |
|---|---|---|
| 1/4 | 59.3 | 2.09 |
| 1/3 | 79 | 2.79 |
| 1/2 | 119 | 4.18 |
| 2/3 | 158 | 5.57 |
| 3/4 | 178 | 6.27 |
| 1 | 237 | 8.36 |
| 1 1/2 | 356 | 12.5 |
| 2 | 474 | 16.7 |
| 3 | 711 | 25.1 |
Grams to cups chart for water
| Grams | Cups | Ounces |
|---|---|---|
| 10 | 0 | 0.35 |
| 25 | 1/8 | 0.88 |
| 50 | 1/4 | 1.76 |
| 75 | 1/3 | 2.65 |
| 100 | 3/8 | 3.53 |
| 125 | 1/2 | 4.41 |
| 150 | 5/8 | 5.29 |
| 200 | 7/8 | 7.05 |
| 250 | 1 | 8.82 |
| 300 | 1 1/4 | 10.6 |
| 500 | 2 1/8 | 17.6 |
Spoon reference: 1 tablespoon ≈ 14.8 g, 1 teaspoon ≈ 4.94 g.
Why water is the baseline for every conversion
Water is the reference point all other ingredient densities are measured against: 1 cup weighs about 237 g, and 1 ml of water weighs exactly 1 g. That tidy 1:1 relationship is why metric recipes can list water in grams or millilitres interchangeably — 250 ml of water is 250 g. It also explains why dense liquids like syrup weigh far more per cup, while flour and other dry goods weigh much less. When a recipe gives water by weight, you can pour it straight onto the scale rather than dirtying a measuring cup.
Frequently asked questions
- How many grams is 1 cup of water?
- 1 US cup of water weighs about 237 grams (8.36 ounces).
- How many cups is 100g of water?
- 100 grams of water is about 3/8 cup.
- How many cups is 200g of water?
- 200 grams of water is about 7/8 cup.
- How many cups is 250g of water?
- 250 grams of water is about 1 cup.
- How many cups is 300g of water?
- 300 grams of water is about 1 1/4 cups.
- How many cups is 500g of water?
- 500 grams of water is about 2 1/8 cups.
- How many grams is ½ cup of water?
- Half a US cup of water is about 119 grams.
- How much does 1 cup of water weigh?
- 1 cup of water weighs about 237 grams, or roughly 8.36 ounces.
- How many grams in a tablespoon of water?
- About 14.8 grams per tablespoon (and roughly 4.94 g per teaspoon).
- Why do my numbers differ slightly?
- Density changes with how the water is packed, sifted or measured. For precise baking, weigh with a scale instead of using cups.
- How many grams is 2 cups of water?
- About 474 g — water runs roughly 237 g per US cup.
- How many cups is 150g of water?
- Around ⅝ of a cup.
- Does 1 ml of water equal 1 gram?
- Yes — for water, 1 ml weighs exactly 1 g, so 250 ml is 250 g. This holds only for water and very thin water-based liquids.
- How many grams is a cup of warm versus cold water?
- The difference is tiny in cooking — water expands slightly when heated, but 1 cup is about 237 g whether warm or cold.
- How much does 1 fluid ounce of water weigh?
- Almost exactly 1 ounce (about 29.6 g), since a US cup of water is roughly 8.4 oz by weight.