Caster Sugar — Grams & Cups Converter
1 cup of caster sugar (also called superfine sugar) weighs about 225 g. So 100 g ≈ 1/2 cup, 200 g ≈ 7/8 cup, and 300 g ≈ 1 1/3 cups. Convert any amount between grams, cups, ounces, tablespoons and millilitres with the calculator below.
💡 Tip: There's no US equivalent of caster sugar — make your own by blitzing regular granulated sugar in a food processor for 10–20 seconds until fine but not powdery (over-processing turns it into powdered sugar).
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Cups to grams chart for caster sugar
| Cups | Grams | Ounces |
|---|---|---|
| 1/4 | 56.3 | 1.98 |
| 1/3 | 75 | 2.65 |
| 1/2 | 113 | 3.97 |
| 2/3 | 150 | 5.29 |
| 3/4 | 169 | 5.95 |
| 1 | 225 | 7.94 |
| 1 1/2 | 338 | 11.9 |
| 2 | 450 | 15.9 |
| 3 | 675 | 23.8 |
Grams to cups chart for caster sugar
| Grams | Cups | Ounces |
|---|---|---|
| 10 | 0 | 0.35 |
| 25 | 1/8 | 0.88 |
| 50 | 1/4 | 1.76 |
| 75 | 1/3 | 2.65 |
| 100 | 1/2 | 3.53 |
| 125 | 1/2 | 4.41 |
| 150 | 2/3 | 5.29 |
| 200 | 7/8 | 7.05 |
| 250 | 1 1/8 | 8.82 |
| 300 | 1 1/3 | 10.6 |
| 500 | 2 1/4 | 17.6 |
Spoon reference: 1 tablespoon ≈ 14.1 g, 1 teaspoon ≈ 4.69 g.
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Frequently asked questions
- How many grams is 1 cup of caster sugar?
- 1 US cup of caster sugar weighs about 225 grams (7.94 ounces).
- How many cups is 100g of caster sugar?
- 100 grams of caster sugar is about 1/2 cup.
- How many cups is 200g of caster sugar?
- 200 grams of caster sugar is about 7/8 cup.
- How many cups is 250g of caster sugar?
- 250 grams of caster sugar is about 1 1/8 cups.
- How many cups is 300g of caster sugar?
- 300 grams of caster sugar is about 1 1/3 cups.
- How many cups is 500g of caster sugar?
- 500 grams of caster sugar is about 2 1/4 cups.
- How many grams is ½ cup of caster sugar?
- Half a US cup of caster sugar is about 113 grams.
- How much does 1 cup of caster sugar weigh?
- 1 cup of caster sugar weighs about 225 grams, or roughly 7.94 ounces.
- How many grams in a tablespoon of caster sugar?
- About 14.1 grams per tablespoon (and roughly 4.69 g per teaspoon).
- Why do my numbers differ slightly?
- Density changes with how the caster sugar is packed, sifted or measured. For precise baking, weigh with a scale instead of using cups.
- How many cups is 225g of caster sugar?
- 225g of caster sugar is exactly 1 cup (it's the density used here, 225g per cup).
- How many cups is 200g of caster sugar?
- 200g of caster sugar is about ⅞ cup (200 ÷ 225 = 0.89).
- How many cups is 150g of caster sugar?
- 150g of caster sugar is ⅔ cup (150 ÷ 225 = 0.67).
- How many cups is 100g of caster sugar?
- 100g of caster sugar is a touch under ½ cup (100 ÷ 225 = 0.44).
- How many cups is 50g of caster sugar?
- 50g of caster sugar is about ¼ cup (50 ÷ 225 = 0.22).
- Can I use granulated sugar instead of caster sugar?
- Yes — swap 1:1 by weight. Caster is just superfine granulated, so it dissolves faster (better for meringues, creaming and delicate batters), but the sweetness and weight are identical.