Convert Caster Sugar from Cup to Grams
How many grams is 1 cup of caster sugar?
1 cup of caster sugar (castor sugar) is 225 grams. 2 cups of caster sugar is 450 grams. 1/2 cup of caster sugar is 112.5 grams. 1/4 cup (0.25 cup) of caster sugar is 56.25 grams. Use the converter below for any amount.
- These figures use the metric cup (250 ml), so 1 cup is 225 g. A US cup is slightly smaller at 240 ml and holds about 216 g.
- Cup sizes are not standard worldwide, so the same cup of an ingredient can weigh more or less depending on the country. What is a cup measurement →
More about measuring Caster Sugar
Caster Sugar substitutes
Ran out? What to use instead of caster sugar →
No measuring cups? The tool below gets you close, and a measuring cup set keeps every batch the same.
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225 GramsCaster Sugar Calculators & Baking Tools
Working with caster sugar? These tools handle the jobs a converter cannot.
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- Oven to Air Fryer Converter Match the temperature and time when you swap the oven for an air fryer, fan oven, or slow cooker.
- Recipe Scaler Scale any recipe up or down and keep every ingredient in ratio.
Common Caster Sugar Conversions
Here are the most common caster sugar conversions from cups to grams.
| Cups | Grams |
|---|---|
| 0.25 cups | 56.25 g |
| 0.5 cups | 112.5 g |
| 0.75 cups | 168.75 g |
| 1 cup | 225 g |
| 1.25 cups | 281.25 g |
| 1.5 cups | 337.5 g |
| 2 cups | 450 g |
| 2.5 cups | 562.5 g |
| 3 cups | 675 g |
For cups to grams with a different ingredient, use the cups to grams converter for a quick-reference table.
For the reverse conversion, see 100 grams of caster sugar in cups.
Frequently Asked Questions
- What is 1 cup of caster sugar in grams?
- 1 cup of caster sugar is 225 grams. The ratio is fixed, so 2 cups of caster sugar is 450 grams and 0.5 cups is 112.5 grams. Use the converter above for any quantity, or check the conversion chart on this page for the most common amounts at a glance. Open the caster sugar converter
- How many grams is 1.5 cups of caster sugar?
- 1.5 cups of caster sugar is 337.5 grams. The ratio is fixed, so 1 cup of caster sugar is 225 grams and 2 cups is 450 grams. Type any other amount into the converter above for the exact figure, or use the chart above for the common ones.
- What is 2 cups of caster sugar in grams?
- 2 cups of caster sugar is 450 grams. Conversions scale in a straight line, so halving or doubling a recipe keeps the same ratio. 1 cup of caster sugar is 225 grams, and you can multiply or divide that figure to match whatever your recipe needs. Enter any amount in the converter above for an exact grams reading.
- How many cups of caster sugar is 225 grams?
- 225 grams of caster sugar is 1 cup. The conversion works the same in reverse, so you can switch between grams and cups without changing the result. This helps when a recipe lists cups but you would rather weigh or measure in grams. The converter above and the chart above cover both directions for any amount.
- How much is 1 cup of castor sugar in grams?
- Castor sugar is another name for caster sugar, so 1 cup of castor sugar is 225 grams, exactly the same as caster sugar. The figure does not change with the name: 2 cups is 450 grams and 0.5 cups is 112.5 grams. Use the converter above for any quantity, or read the conversion chart on this page for the most common amounts.
Related to Caster Sugar
Sugar
Granulated sugar swaps 1:1 for caster sugar in most recipes, though its larger crystals dissolve more slowly. For meringues or smooth sponges, pulse granulated sugar in a food processor for a few seconds to bring it closer to caster's finer grain. See our Sugar converter.
Icing Sugar
Icing sugar is milled far finer and packs much lighter than caster (125 g vs 225 g per cup), so it is not a 1:1 swap. Use it only where a powder works, such as uncooked frostings and dusting, not for creaming into a cake batter. See our Icing Sugar converter.
Raw Sugar
Raw sugar has large, coarse crystals that dissolve slowly, the opposite of fine caster sugar. It packs lighter (200 g vs 225 g per cup), so it is not a 1:1 swap by volume; weigh when substituting. See our Raw Sugar converter.
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