3 Cups of Water in Grams
3 cups of water weighs 720 grams (about 25.4 oz), based on 240 g per US cup (1 US cup = 240 ml). That's the same as 48 tablespoons of water. When a recipe's outcome depends on accuracy — especially baking — weigh it instead of measuring by cup.
3 cups is batch territory — a cup-measuring error is multiplied three times over, which for water is the difference between 720 g and something noticeably off. Weigh it if you can.
How much is 3 cups of water?
| Grams | 720 g |
|---|---|
| Milliliters | 720 ml |
| Ounces (weight) | 25.4 oz |
| Tablespoons | 48 tbsp |
| Teaspoons | 144 tsp |
| Density used | 240 g per US cup |
No 3 cups measure? Use spoons
3 cups is exactly 48 tablespoons, which is 720 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 3 cups
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 | 1 ½ cups | 360 g | 24 tablespoons |
| As written | 3 cups | 720 g | 48 tablespoons |
| Double | 6 cups | 1440 g | 96 tablespoons |
Nearby amounts
| Cups | Grams | Ounces |
|---|---|---|
| 1½ cups | 360 g | 12.7 oz |
| 2 cups | 480 g | 16.9 oz |
| 3 cups | 720 g | 25.4 oz |
Every cup fraction of water in grams — the full chart.
How to measure 3 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.
3 cup of other ingredients
- 3 cup all-purpose flour in grams — 360 g
- 3 cup granulated sugar in grams — 600 g
- 3 cup powdered sugar in grams — 360 g
- 3 cup brown sugar (packed) in grams — 639 g
- 3 cup honey in grams — 1020 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.