How to measure superfine (caster) sugar
How full the cup is and how firmly it is packed changes what it holds, so the same cup can weigh a little more or less in your kitchen. A scale gives the same result every time; the chart below converts any amount.
Source: 190 grams per US cup is the weight per cup in King Arthur Baking’s ingredient weight chart, entry “Superfine sugar (castor sugar), 1 cup = 6 3/4 oz = 190 g”. A US cup is about 237 milliliters.
Superfine (caster) sugar: cups to grams chart
| Cups | Grams | Ounces |
|---|---|---|
| 1/8 cup | 24 g | 0.84 oz |
| 1/4 cup | 48 g | 1.68 oz |
| 1/3 cup | 63 g | 2.23 oz |
| 1/2 cup | 95 g | 3.35 oz |
| 2/3 cup | 127 g | 4.47 oz |
| 3/4 cup | 143 g | 5.03 oz |
| 1 cup | 190 g | 6.7 oz |
| 1 1/2 cups | 285 g | 10.1 oz |
| 2 cups | 380 g | 13.4 oz |
| 3 cups | 570 g | 20.1 oz |
| 4 cups | 760 g | 26.8 oz |
Tablespoons and teaspoons of superfine (caster) sugar
Three teaspoons make a tablespoon and 16 tablespoons make a cup, so the spoon weights follow straight from the 190 grams per cup. Use level spoons, not heaped ones.
| Spoons | Grams |
|---|---|
| 1/4 tsp | 1 g |
| 1/2 tsp | 2 g |
| 1 tsp | 4 g |
| 1 tbsp | 12 g |
| 2 tbsp | 24 g |
| 3 tbsp | 36 g |
| 4 tbsp | 48 g |
Grams of superfine (caster) sugar to cups
Going the other way, divide the grams by 190. A cup of superfine (caster) sugar weighs 47 grams less than a cup of water, which is 237 grams.
| Grams | Cups | In the kitchen |
|---|---|---|
| 25 g | 0.13 cup | about 2.1 tbsp |
| 50 g | 0.26 cup | just over 1/4 cup |
| 100 g | 0.53 cup | just over 1/2 cup |
| 150 g | 0.79 cup | just over 3/4 cup |
| 200 g | 1.05 cups | just over 1 cup |
| 250 g | 1.32 cups | just under 1 1/3 cups |
| 300 g | 1.58 cups | just under 1 5/8 cups |
| 400 g | 2.11 cups | just under 2 1/8 cups |
| 500 g | 2.63 cups | about 2 5/8 cups |
| 1,000 g | 5.26 cups | just over 5 1/4 cups |
Other sugars per cup
- Granulated sugar: 198 grams per cup
- Brown sugar (packed): 213 grams per cup
- Powdered sugar: 113 grams per cup
- Coconut sugar: 154 grams per cup
- Turbinado sugar: 180 grams per cup
- Demerara sugar: 220 grams per cup
- Molasses: 337 grams per cup
- Light corn syrup: 341 grams per cup
- Agave syrup: 336 grams per cup
For every ingredient in one place, open the cups to grams converter. The recipe scaler halves or doubles a recipe, sugar included, and the oven temperature converter translates Celsius and gas marks for bakes from abroad.
Frequently asked questions
How many grams is 1/2 cup of superfine (caster) sugar?
About 95 grams. A full cup is about 190 grams and 1/4 cup about 48 grams.
How many cups is 100 grams of superfine (caster) sugar?
About 0.53 cups, just over 1/2 cup. Divide the grams by 190 to get cups.
How many grams are in a tablespoon of superfine (caster) sugar?
About 12 grams in a tablespoon and 4 grams in a teaspoon, measured level.
Where does 190 grams per cup of superfine (caster) sugar come from?
From King Arthur Baking’s ingredient weight chart, which gives 1 cup = 6 3/4 oz = 190 g.