1 Cup of Water in Grams
1 cup of water weighs 240 grams (about 8.5 oz), based on 240 g per US cup (1 US cup = 240 ml). That's the same as 16 tablespoons of water. When a recipe's outcome depends on accuracy — especially baking — weigh it instead of measuring by cup.
One US cup is the reference every other fraction on this page derives from: 240 g of water (1 US cup = 240 ml). Halve it for 120 g, double it for 480 g.
How much is 1 cup of water?
| Grams | 240 g |
|---|---|
| Milliliters | 240 ml |
| Ounces (weight) | 8.5 oz |
| Tablespoons | 16 tbsp |
| Teaspoons | 48 tsp |
| Density used | 240 g per US cup |
No 1 cup measure? Use spoons
1 cup is exactly 16 tablespoons, which is 240 g of water. Measuring spoons are stamped to a tighter tolerance than cups, so for small amounts the spoon route is usually the more accurate one even when you do own the cup.
Halving and doubling 1 cup
Scaling a recipe is the usual reason this conversion comes up, and grams scale cleanly where cup fractions do not:
| Recipe | Cups | Grams | Spoons |
|---|---|---|---|
| Half | ½ cup | 120 g | 8 tablespoons |
| As written | 1 cup | 240 g | 16 tablespoons |
| Double | 2 cups | 480 g | 32 tablespoons |
Nearby amounts
| Cups | Grams | Ounces |
|---|---|---|
| ⅔ cups | 160 g | 5.6 oz |
| ¾ cups | 180 g | 6.3 oz |
| 1 cup | 240 g | 8.5 oz |
| 1½ cups | 360 g | 12.7 oz |
| 2 cups | 480 g | 16.9 oz |
Every cup fraction of water in grams — the full chart.
How to measure 1 cup of water
Water is the reference ingredient: 1 US cup (240 ml) weighs 240 g, so grams and milliliters are interchangeable. Any liquid measuring cup works; read at eye level.
1 cup of other ingredients
- 1 cup all-purpose flour in grams — 120 g
- 1 cup granulated sugar in grams — 200 g
- 1 cup powdered sugar in grams — 120 g
- 1 cup brown sugar (packed) in grams — 213 g
- 1 cup honey in grams — 340 g
Convert another amount
250 cups Water = 60000 g
Based on 240 g per US cup.
Reverse conversion: grams of water to cups.
Density 240 g/cup — sources: density (1.00 g/ml), USDA FoodData Central. Data verified 2026-08-20. Methodology.