Convert Caster Sugar from Cup to Teaspoon
How many teaspoons is 1 cup of caster sugar?
1 cup of caster sugar (castor sugar) is 50 teaspoons. 2 cups of caster sugar is 100 teaspoons. 1/2 cup of caster sugar is 25 teaspoons. 1/4 cup (0.25 cup) of caster sugar is 12.5 teaspoons. Use the converter below for any amount.
- These figures use the metric cup (250 ml). A US cup is slightly smaller at 240 ml, so it holds a little less.
- 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 →
- A teaspoon here is the 5 ml standard, the same in the UK, Europe, and Australia. A US teaspoon is fractionally smaller at about 4.9 ml. When teaspoon size matters →
- A little over or under won't ruin the bake. An extra spoon mainly makes it sweeter.
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.
Scoop it right, get measuring cupsCaster Sugar Measurement Converter
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50 TeaspoonCaster Sugar Calculators & Baking Tools
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Common Caster Sugar Conversions
Here are the most common caster sugar conversions from cups to teaspoons.
| Cups | Teaspoons |
|---|---|
| 0.25 cups | 12.5 tsp |
| 0.5 cups | 25 tsp |
| 0.75 cups | 37.5 tsp |
| 1 cup | 50 tsp |
| 1.25 cups | 62.5 tsp |
| 1.5 cups | 75 tsp |
| 2 cups | 100 tsp |
| 2.5 cups | 125 tsp |
| 3 cups | 150 tsp |
This is a volume conversion, so the result is the same for every ingredient. Use the cups to teaspoons volume converter to switch between cups, tablespoons, teaspoons, and millilitres without weighing.
Frequently Asked Questions
- What is 1 cup of caster sugar in teaspoons?
- 1 cup of caster sugar is 50 teaspoons. The ratio is fixed, so 2 cups of caster sugar is 100 teaspoons and 0.5 cups is 25 teaspoons. 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 teaspoons is 1.5 cups of caster sugar?
- 1.5 cups of caster sugar is 75 teaspoons. The ratio is fixed, so 1 cup of caster sugar is 50 teaspoons and 2 cups is 100 teaspoons. 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 teaspoons?
- 2 cups of caster sugar is 100 teaspoons. Conversions scale in a straight line, so halving or doubling a recipe keeps the same ratio. 1 cup of caster sugar is 50 teaspoons, and you can multiply or divide that figure to match whatever your recipe needs. Enter any amount in the converter above for an exact teaspoons reading.
- How many cups of caster sugar is 50 teaspoons?
- 50 teaspoons of caster sugar is 1 cup. The conversion works the same in reverse, so you can switch between teaspoons and cups without changing the result. This helps when a recipe lists cups but you would rather weigh or measure in teaspoons. The converter above and the chart above cover both directions for any amount.
- How much is 1 cup of castor sugar in teaspoons?
- Castor sugar is another name for caster sugar, so 1 cup of castor sugar is 50 teaspoons, exactly the same as caster sugar. The figure does not change with the name: 2 cups is 100 teaspoons and 0.5 cups is 25 teaspoons. 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.
Brown Sugar
Brown sugar is caster sugar's opposite in the creaming bowl: damp, clumping, and pressed into the cup instead of levelled off. Swap it in and the molasses brings moisture with it, so a sponge built for caster comes out denser, darker, and slower to dry out. See our Brown 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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