Sugar Density & Measurement Matrix: Granulated, Brown & Confectioners
Unlike flour, granulated sugar is remarkably dense and uniform because crystalline sucrose pours like fine sand, leaving minimal air voids.
Granulated sugar has a specific gravity of approximately 0.85 to 0.90 relative to water. A standard 1 cup volume contains 200 grams (7.05 oz) of granulated sugar. Because of the crystalline shape, shaking or tapping a cup of white sugar only alters its volume by 2-3%.
Brown sugar behaves differently due to the viscous molasses coating each sucrose crystal. When a recipe calls for "packed brown sugar," it intends for you to press the sugar down firmly with your fingers until it holds the shape of the cup when inverted. A packed cup weighs 215g (7.58 oz).
Confectioners sugar (powdered sugar) contains pulverized sugar crystals blended with cornstarch to prevent caking. Because the particles are micro-fine, it traps substantial air, weighing only 120g (4.23 oz) per cup unsifted and 100g (3.53 oz) sifted.
Density variations
| Type | g/cup | oz/cup | Notes |
|---|---|---|---|
| Granulated White Sugar (Pure Sucrose) | 200 | 7.05 | Dense uniform crystal grid; remarkably consistent across brands. |
| Brown Sugar (Firmly Packed) | 215 | 7.58 | Molasses film creates cohesion; must be packed to expel voids. |
| Brown Sugar (Lightly Spooned) | 180 | 6.35 | Air pockets remain; not recommended unless recipe states loose. |
| Powdered / Confectioners (Unsifted) | 120 | 4.23 | Ground sucrose with 3% cornstarch; highly aerated. |
| Powdered Sugar (Sifted) | 100 | 3.53 | Sifted confectioners sugar for delicate icings. |
| Turbinado / Raw Cane Sugar | 190 | 6.7 | Large coarse crystals with trace cane molasses. |
| Maple Syrup (Pure Grade A) | 312 | 11 | Dense viscous liquid; 1 cup weighs 11 oz (312g). |
Conversion table
| Ounces | Grams | Cups | Tablespoons |
|---|---|---|---|
| 1 | 28.3 | 2.3 tbsp | 2.3 |
| 2 | 56.7 | ¼ cup | 4.5 |
| 3.5 | 99.2 | ½ cup | 8 |
| 7.05 | 200 | 1 Full Cup | 16 |
| 8 | 226.8 | 1 ⅛ cups | 18.1 |
| 16 | 453.6 | 2 ¼ cups (1 lb) | 36.3 |
| 32 | 907.2 | 4 ½ cups (2 lb) | 72.6 |
Baking & measurement tips
- 1 pound of granulated sugar equals almost exactly 2 ¼ cups.
- When substituting brown sugar for white, weigh equal grams for accurate sweetness and chemical hydration.
- Always sift powdered sugar before preparing glazes or royal icing to prevent grainy clumping.
Frequently Asked Questions
How many ounces is 1 cup of granulated white sugar?
One standard US cup of granulated sugar weighs 7.05 ounces (200 grams).
How many cups of sugar is in a 4-lb bag?
A standard 4-lb (64 oz) bag of granulated sugar contains approximately 9 cups of sugar.
Why does brown sugar weigh more than white sugar per cup?
Packed brown sugar contains dense molasses coating that fills crystal interstices, increasing density to 215g per cup.