Caster Sugar: Complete Cup to Gram Conversion
1 cup of caster sugar weighs 210g (spooned, USDA standard) or varies by measuring technique. See the full 16-interval conversion table for all amounts below.
Caster Sugar Conversion Table
1 cup caster sugar = 210g (USDA FoodData Central basis. 1 cup = 240ml)
| Amount | Grams (g) | Ounces (oz) | Milliliters (ml) |
|---|---|---|---|
| 1/8 cup | 26.25g | 0.93 oz | 30 ml |
| 1/4 cup | 52.5g | 1.85 oz | 60 ml |
| 1/3 cup | 70g | 2.47 oz | 80 ml |
| 1/2 cup | 105g | 3.7 oz | 120 ml |
| 2/3 cup | 140g | 4.94 oz | 160 ml |
| 3/4 cup | 157.5g | 5.56 oz | 180 ml |
| 1 cup1 cup | 210g | 7.41 oz | 240 ml |
| 1 1/4 cups | 262.5g | 9.26 oz | 300 ml |
| 1 1/2 cups | 315g | 11.11 oz | 360 ml |
| 1 2/3 cups | 350g | 12.35 oz | 400 ml |
| 2 cups | 420g | 14.82 oz | 480 ml |
| 2 1/2 cups | 525g | 18.52 oz | 600 ml |
| 3 cups | 630g | 22.22 oz | 720 ml |
| 3 1/2 cups | 735g | 25.93 oz | 840 ml |
| 4 cups | 840g | 29.63 oz | 960 ml |
Source: USDA FoodData Central SR Legacy. Values shown for spooned (not packed) measurement unless specified.
Caster Sugar vs Other Sugar Types
Different types of sugar vary in weight per cup due to different densities.
| Sugar Type | 1 Cup (g) | Density (g/ml) |
|---|---|---|
| Caster Sugarcurrent | 210g | 0.875 |
| Granulated Sugar | 200g | 0.833 |
| Brown Sugar (packed) | 220g | 0.917 |
| Powdered Sugar | 120g | 0.5 |
Why Does 1 Cup of Caster Sugar Vary?
The weight of 1 cup depends on how you measure. USDA standard (spooned) = 210g.
Spooned & Leveled
Spoon the ingredient into the measuring cup, then level off with a straight edge. This is the standard method used by USDA FoodData Central.
Reference weightSifted
Sift the ingredient first, then spoon into the cup. Sifting aerates the ingredient, reducing weight by 10-20%.
~10-20% lighterScooped (packed)
Dip the cup directly into the bag and pack. This is the most inaccurate method — can be 20-30% heavier than spooned.
~20-30% heavierAbout Caster Sugar Density
Caster sugar (superfine sugar) has finer crystals than regular granulated sugar. 1 cup = 210g. Dissolves faster than regular sugar — ideal for meringues, mousses, cold drinks. Common in UK/Australian recipes.
Pro tip: For consistent baking results, use a kitchen scale. Weight measurements eliminate the variability of cup measurement entirely. USDA values shown are based on the spooned & leveled method.
Caster Sugar: Grams to Cups Conversion
Convert caster sugar from grams back to cups, tablespoons, and teaspoons.
| Grams | Cups | Tablespoons | Teaspoons |
|---|---|---|---|
| 25g | 0.12 cups | 1.9 tbsp | 5.71 tsp |
| 50g | 0.24 cups | 3.81 tbsp | 11.43 tsp |
| 100g | 0.48 cups | 7.62 tbsp | 22.86 tsp |
| 150g | 0.71 cups | 11.43 tbsp | 34.29 tsp |
| 200g | 0.95 cups | 15.24 tbsp | 45.71 tsp |
| 250g | 1.19 cups | 19.05 tbsp | 57.14 tsp |
| 300g | 1.43 cups | 22.86 tbsp | 68.57 tsp |
| 400g | 1.9 cups | 30.48 tbsp | 91.43 tsp |
| 500g | 2.38 cups | 38.1 tbsp | 114.29 tsp |
Based on 1 cup caster sugar = 210g (USDA standard, spooned & leveled). 16 tablespoons = 1 cup. 48 teaspoons = 1 cup.
Related Ingredients
Direct Conversion Pages for Caster Sugar
Each page focuses on one conversion direction with a dedicated table.