Convert Caster Sugar from Teaspoon
How much is 1 teaspoon of caster sugar?
1 teaspoon of caster sugar (castor sugar) is 4.5 grams, about 0.16 ounces. 0.5 teaspoons of caster sugar is 2.25 grams and 2 teaspoons is 9 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
Enter a value and pick your units.
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0Caster 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.
- Volume Converter Switch between cups, tablespoons, teaspoons and millilitres for any ingredient.
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 |
Caster Sugar Conversion Chart
The conversion chart below gives a quick reference for converting caster sugar from Teaspoon to other measurements.
| tsp | cup | grams | ounces | lb | kg | cup(US) | tbsp |
|---|---|---|---|---|---|---|---|
| 1 tsp | 0.02 cup | 4.5 g | 0.16 oz | 0.01 lb | 0 kg | 0.02 cup (US) | 0.33 tbsp |
| 2 tsp | 0.04 cup | 9 g | 0.32 oz | 0.02 lb | 0.01 kg | 0.04 cup (US) | 0.67 tbsp |
| 3 tsp | 0.06 cup | 13.5 g | 0.48 oz | 0.03 lb | 0.01 kg | 0.06 cup (US) | 1 tbsp |
| 4 tsp | 0.08 cup | 18 g | 0.64 oz | 0.04 lb | 0.02 kg | 0.08 cup (US) | 1.33 tbsp |
Frequently Asked Questions
- How much is 1 teaspoon of caster sugar?
- 1 teaspoon of caster sugar is 4.5 grams, or 0.16 ounces. The ratio is fixed, so 0.5 teaspoons of caster sugar is 2.25 grams and 2 teaspoons is 9 grams. Whatever unit your recipe uses, enter the amount in the converter above or read the conversion chart on this page for the most common quantities. Open the caster sugar converter
- How much is 1 teaspoon of caster sugar in grams?
- 1 teaspoon of caster sugar is 4.5 grams. The conversion scales in a straight line, so 0.5 teaspoons is 2.25 grams and 2 teaspoons is 9 grams. Multiply or divide that figure to match whatever your recipe needs, or use the converter above for an exact grams reading at any amount. 1 teaspoon caster sugar in grams
- How much is 1 teaspoon of caster sugar in ounces?
- 1 teaspoon of caster sugar is 0.16 ounces. The ratio is fixed, so 0.5 teaspoons is 0.08 ounces and 2 teaspoons is 0.32 ounces. Use the converter above for any other amount, or see the chart on this page for the common quantities at a glance. 1 teaspoon caster sugar in ounces
- How do teaspoons and cups compare as units?
- Teaspoons and cups are both volume units, so the conversion between them does not vary by ingredient. One metric cup holds about 16.67 tablespoons or 50 teaspoons, and the ratio stays fixed regardless of what you are measuring. The volume converter handles any amount between cups, tablespoons, teaspoons, and millilitres. Teaspoons to cups
Measurement Options
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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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