Convert Caster Sugar from Teaspoon to Grams
How many grams is 1 teaspoon of caster sugar?
1 teaspoon of caster sugar (castor sugar) is 4.5 grams. 2 teaspoons of caster sugar is 9 grams. 1/2 teaspoon of caster sugar is 2.25 grams. 1/4 teaspoon (0.25 teaspoon) of caster sugar is 1.13 grams. Use the converter below for any amount.
- 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 spoons? The tool below gets you close, and a measuring spoon set keeps small amounts accurate.
Nail small amounts, get spoonsCaster Sugar Measurement Converter
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4.5 GramsCaster Sugar Calculators & Baking Tools
Working with caster sugar? These tools handle the jobs a converter cannot.
- Jam and Marmalade Calculator Check the sugar a batch of preserve needs and how many jars it fills.
- Pan Size Converter Rescale a recipe for a different cake tin size.
- 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 teaspoons to grams.
| Teaspoons | Grams |
|---|---|
| 0.25 tsp | 1.13 g |
| 0.5 tsp | 2.25 g |
| 1 tsp | 4.5 g |
| 2 tsp | 9 g |
| 3 tsp | 13.5 g |
| 4 tsp | 18 g |
| 6 tsp | 27 g |
| 8 tsp | 36 g |
| 12 tsp | 54 g |
For teaspoons to grams with a different ingredient, use the teaspoons to grams converter for a quick-reference table.
For the reverse conversion, see 250 grams of caster sugar in teaspoons.
Frequently Asked Questions
- What is 1 teaspoon of caster sugar in grams?
- 1 teaspoon of caster sugar is 4.5 grams. The ratio is fixed, so 2 teaspoons of caster sugar is 9 grams and 0.5 teaspoons is 2.25 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 teaspoons of caster sugar?
- 1.5 teaspoons of caster sugar is 6.75 grams. The ratio is fixed, so 1 teaspoon of caster sugar is 4.5 grams and 2 teaspoons is 9 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 teaspoons of caster sugar in grams?
- 2 teaspoons of caster sugar is 9 grams. Conversions scale in a straight line, so halving or doubling a recipe keeps the same ratio. 1 teaspoon of caster sugar is 4.5 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 teaspoons of caster sugar is 4.5 grams?
- 4.5 grams of caster sugar is 1 teaspoon. The conversion works the same in reverse, so you can switch between grams and teaspoons without changing the result. This helps when a recipe lists teaspoons 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 teaspoon of castor sugar in grams?
- Castor sugar is another name for caster sugar, so 1 teaspoon of castor sugar is 4.5 grams, exactly the same as caster sugar. The figure does not change with the name: 2 teaspoons is 9 grams and 0.5 teaspoons is 2.25 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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