Convert Caster Sugar from Pounds to Cup

How many cups is 1 pound of caster sugar?

1 pound of caster sugar (castor sugar) is 2.02 cups. 2 pounds of caster sugar is 4.03 cups. 1/2 pound of caster sugar is 1.01 cups. 1/4 pound (0.25 pound) of caster sugar is 0.5 cups. Use the converter below for any amount.

  • These figures use the metric cup (250 ml). A US cup is slightly smaller at 240 ml, so it holds a little less. Use the US 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 →

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 scale? The tool below gives a good estimate, but for exact bakes a digital kitchen scale removes the guesswork.

Caster Sugar Measurement Converter

Enter a value and pick your units.

Result

0 Cup

Common Caster Sugar Conversions

Here are the most common caster sugar conversions from pounds to cups.

PoundsCups
1 lb2.02 cups
2 lb4.03 cups
4 lb8.06 cups
6 lb12.1 cups

Caster Sugar Conversion Chart

The conversion chart below gives a quick reference for converting caster sugar from Pounds to Cup and other measurements.

lbcupgramsounceskgcup(US)tbsptsp
1 lb2.02 cup453.59 g16.01 oz0.45 kg2.1 cup (US)33.6 tbsp100.8 tsp
2 lb4.03 cup907.18 g32.01 oz0.91 kg4.2 cup (US)67.2 tbsp201.6 tsp
4 lb8.06 cup1814.37 g64.03 oz1.81 kg8.4 cup (US)134.4 tbsp403.19 tsp
6 lb12.1 cup2721.55 g96.04 oz2.72 kg12.6 cup (US)201.6 tbsp604.79 tsp

Frequently Asked Questions

What is 1 pound of caster sugar in cups?
1 pound of caster sugar is 2.02 cups. The ratio is fixed, so 2 pounds of caster sugar is 4.03 cups and 0.5 pounds is 1.01 cups. 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 cups is 1.5 pounds of caster sugar?
1.5 pounds of caster sugar is 3.02 cups. The ratio is fixed, so 1 pound of caster sugar is 2.02 cups and 2 pounds is 4.03 cups. Type any other amount into the converter above for the exact figure, or use the chart below for the common ones.
What is 2 pounds of caster sugar in cups?
2 pounds of caster sugar is 4.03 cups. Conversions scale in a straight line, so halving or doubling a recipe keeps the same ratio. 1 pound of caster sugar is 2.02 cups, and you can multiply or divide that figure to match whatever your recipe needs. Enter any amount in the converter above for an exact cups reading.
How many pounds of caster sugar is 2.02 cups?
2.02 cups of caster sugar is 1 pound. The conversion works the same in reverse, so you can switch between cups and pounds without changing the result. This helps when a recipe lists pounds but you would rather weigh or measure in cups. The converter above and the chart below cover both directions for any amount.
How many cups is 1 pound of castor sugar?
Castor sugar is another name for caster sugar, so 1 pound of castor sugar is 2.02 cups, exactly the same as caster sugar. The figure does not change with the name: 2 pounds is 4.03 cups and 0.5 pounds is 1.01 cups. Use the converter above for any quantity, or read the conversion chart on this page for the most common amounts.
Are caster sugar and castor sugar the same thing?
Yes. Castor sugar is another name for caster sugar, so they are the same ingredient and convert identically. 1 pound of caster sugar is 2.02 cups under either name, and 2 pounds is 4.03 cups. Recipes use the two names interchangeably, so you can follow either one without changing quantities or weighing any differently.
What is 1/2 lb caster sugar in cups?
1/2 pound of caster sugar is 1.01 cups. The ratio is fixed, so 1 pound of caster sugar is 2.02 cups and 2 pounds is 4.03 cups. 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 below for the common ones.
What is 1/4 lb caster sugar in cups?
1/4 pound (0.25 pound) of caster sugar is 0.5 cups. The ratio is fixed, so 1 pound of caster sugar is 2.02 cups and 2 pounds is 4.03 cups. Quarter amounts often come up when scaling a recipe down step by step, and the figure divides cleanly. Use the converter above for any other quantity, or the chart below for the most common amounts.

Other Ingredients

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