Convert Caster Sugar from Cup (US)

How much is 1 US cup of caster sugar?

1 US cup of caster sugar (castor sugar) is 216 grams, about 7.62 ounces. 0.5 US cups of caster sugar is 108 grams and 2 US cups is 432 grams. Use the converter below for any amount.

Caster sugar, also known as superfine or castor sugar, is a key ingredient in many baking recipes due to its fine texture and quick-dissolving properties. Commonly used in cakes, meringues, and desserts, it sits between granulated sugar and powdered sugar in terms of texture. One metric cup (250 ml) of caster sugar weighs around 225 grams or 7.94 ounces.

Since baking is a precise science, even small differences in sugar quantity can affect the final outcome, from texture and sweetness to structure. This page helps you convert caster sugar between grams, cups, tablespoons, and more so that you can follow any recipe confidently, no matter what measurement system it uses.

Also known as

  • castor sugar
  • Superfine Sugar
  • Baker's Sugar
  • Bar Sugar

Standard granulated sugar has larger crystals than caster sugar, so it dissolves more slowly in batters and meringues. They are close in weight (200 g vs 225 g per cup) and swap 1:1 by volume in most recipes, though caster gives a smoother result. See our Sugar converter.

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.

Out of caster sugar? See caster sugar substitutes →

No measuring cups? The tool below gets you close, and a measuring cup set keeps every batch the same.

Caster Sugar Measurement Converter

Enter a value and pick your units.

Result

0

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

Caster Sugar Conversion Chart

The conversion chart below gives a quick reference for converting caster sugar from Cup (US) to other measurements.

cup(US)cupgramsouncestbsptsp
0.25 cup (US)0.24 cup54 g1.91 oz4 tbsp12 tsp
0.5 cup (US)0.48 cup108 g3.81 oz8 tbsp24 tsp
1 cup (US)0.96 cup216 g7.62 oz16 tbsp48 tsp
2 cup (US)1.92 cup432 g15.24 oz32 tbsp96 tsp

Frequently Asked Questions

How much is 1 US cup of caster sugar?
1 US cup of caster sugar is 216 grams, or 7.62 ounces. The ratio is fixed, so 0.5 US cups of caster sugar is 108 grams and 2 US cups is 432 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 many grams is 1 US cup of caster sugar?
1 US cup of caster sugar is 216 grams. The conversion scales in a straight line, so 0.5 US cups is 108 grams and 2 US cups is 432 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 US cup caster sugar in grams
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 US cups and grams without changing the result. This helps when a recipe lists one unit but you would rather measure in the other. The converter above and the chart below cover both directions for any amount.
What is 1 US cup of caster sugar in ounces?
1 US cup of caster sugar is 7.62 ounces. The ratio is fixed, so 0.5 US cups is 3.81 ounces and 2 US cups is 15.24 ounces. Use the converter above for any other amount, or see the chart on this page for the common quantities at a glance. 1 US cup caster sugar in ounces
How do US cups and tablespoons compare as units?
US cups and tablespoons 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. Cups (US) to tablespoons

Measurement Options

Choose from the following measurements to convert to

Other Ingredients

If you need help with any other ingredients click below: