Convert Caster Sugar from Cup (US) to Grams
How many grams is 1 US cup of caster sugar?
1 US cup of caster sugar (castor sugar) is 216 grams. 2 US cups of caster sugar is 432 grams. 1/2 US cup of caster sugar is 108 grams. 1/4 US cup (0.25 US cup) of caster sugar is 54 grams. 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 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
Enter a value and pick your units.
Result
216 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 cups (US) to grams.
| Cups (US) | Grams |
|---|---|
| 0.25 cups (US) | 54 g |
| 0.5 cups (US) | 108 g |
| 0.75 cups (US) | 162 g |
| 1 cup (US) | 216 g |
| 1.25 cups (US) | 270 g |
| 1.5 cups (US) | 324 g |
| 2 cups (US) | 432 g |
| 2.5 cups (US) | 540 g |
| 3 cups (US) | 648 g |
For cups to grams with a different ingredient, use the cups to grams converter for a quick-reference table.
For the reverse conversion, see 100 grams of caster sugar in US cups.
Frequently Asked Questions
- What is 1 US cup of caster sugar in grams?
- 1 US cup of caster sugar is 216 grams. The ratio is fixed, so 2 US cups of caster sugar is 432 grams and 0.5 US cups is 108 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 US cups of caster sugar?
- 1.5 US cups of caster sugar is 324 grams. The ratio is fixed, so 1 US cup of caster sugar is 216 grams and 2 US cups is 432 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 US cups of caster sugar in grams?
- 2 US cups of caster sugar is 432 grams. Conversions scale in a straight line, so halving or doubling a recipe keeps the same ratio. 1 US cup of caster sugar is 216 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 US cups of caster sugar is 216 grams?
- 216 grams of caster sugar is 1 US cup. The conversion works the same in reverse, so you can switch between grams and US cups without changing the result. This helps when a recipe lists US cups but you would rather weigh or measure in grams. The converter above and the chart above cover both directions for any amount.
- What is 1/2 cup (US) caster sugar in grams?
- 1/2 US cup of caster sugar is 108 grams. The ratio is fixed, so 1 US cup of caster sugar is 216 grams and 2 US cups is 432 grams. Half measures come up often when scaling a recipe down, and the figure divides cleanly. Use the converter above for any other amount, or the chart above 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.
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.
See all available cooking ingredients and fresh produce.