Convert Caster Sugar from Grams to Cup (US)
How many US cups is 100 grams of caster sugar?
100 grams of caster sugar (castor sugar) is 0.46 US cups. 200 grams of caster sugar is 0.93 US cups. 225 grams of caster sugar is 1.04 US cups. 500 grams of caster sugar is 2.31 US cups. Use the converter below for any amount.
- These figures use the US cup (240 ml), so 1 cup is 216 g. A metric cup is slightly larger at 250 ml and holds about 225 g. Use the metric cup converter →
- 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 scale? The tool below gives a good estimate, but for exact bakes a digital kitchen scale removes the guesswork.
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1.16 Cup (US)Caster 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 grams to cups (US).
| Grams | Cups (US) |
|---|---|
| 50 g | 0.23 cups (US) |
| 100 g | 0.46 cups (US) |
| 125 g | 0.58 cups (US) |
| 150 g | 0.69 cups (US) |
| 175 g | 0.81 cups (US) |
| 200 g | 0.93 cups (US) |
| 225 g | 1.04 cups (US) |
| 250 g | 1.16 cups (US) |
| 300 g | 1.39 cups (US) |
| 400 g | 1.85 cups (US) |
| 450 g | 2.08 cups (US) |
| 500 g | 2.31 cups (US) |
For grams to cups with a different ingredient, use the grams to cups converter for a quick-reference table.
Frequently Asked Questions
- How many US cups is 100 grams of caster sugar?
- 100 grams of caster sugar is 0.46 US cups. The conversion is fixed, so 50 grams is 0.23 US cups and 200 grams is 0.93 US cups. Halving or doubling a recipe keeps the same ratio. Use the converter above for any other amount, or the conversion chart on this page for the common ones. Open the caster sugar converter
- How many US cups is 200 grams of caster sugar?
- 200 grams of caster sugar is 0.93 US cups. The conversion is fixed, so 100 grams is 0.46 US cups and 400 grams is 1.85 US cups. Halving or doubling a recipe keeps the same ratio. Use the converter above for any other amount, or the conversion chart on this page for the common ones.
- What is 225g caster sugar in US cups?
- 225 grams of caster sugar is 1.04 US cups. The conversion is fixed, so 112.5 grams is 0.52 US cups and 450 grams is 2.08 US cups. Halving or doubling a recipe keeps the same ratio. Use the converter above for any other amount, or the conversion chart on this page for the common ones.
- What is 500g caster sugar in US cups?
- 500 grams of caster sugar is 2.31 US cups. The conversion is fixed, so 250 grams is 1.16 US cups and 1 kg is 4.63 US cups. Halving or doubling a recipe keeps the same ratio. Use the converter above for any other amount, or the conversion chart on this page for the common ones.
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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