Convert Icing Sugar from Ounces to Cup

How many cups is 1 ounce of icing sugar?

1 ounce of icing sugar (Powdered Sugar) is 0.23 cups. 2 ounces of icing sugar is 0.45 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 →

Icing sugar is a finely milled white sugar with a light, silky texture. One metric cup weighs approximately 125 grams (4.41 oz), noticeably lighter than granulated sugar because the fine particles don't pack as tightly. It's used in buttercreams, glazes, frostings, and as a dusting over cakes and pastries.

Icing sugar is so fine and airy that the amount you get in a cup can vary significantly depending on how it's scooped — measuring by weight gives far more consistent results. This page lets you convert icing sugar between grams, cups, tablespoons, and more so your recipes turn out reliably every time.

Also known as

  • Powdered Sugar
  • Confectioners' Sugar

Granulated sugar is the coarse, crystalline form that icing sugar is milled from. It is heavier by cup (201 g vs 125 g) and creams into butter for cakes, whereas icing sugar suits frostings and dusting, so the two are not a straight 1:1 swap. See our Sugar converter.

Raw sugar has large, coarse crystals with a faint molasses taste, far removed from the fine powder of icing sugar. It packs much heavier (200 g vs 125 g per cup), so the two are not a straight swap. See our Raw Sugar converter.

Out of icing sugar? See icing sugar substitutes →

No scale? No worries. The tool below gives a good estimate, but for exact bakes a digital kitchen scale is worth it.

Icing Sugar Measurement Converter

Enter a value and pick your units.

Result

0 Cup

Common Icing Sugar Conversions

Here are the most common icing sugar conversions from ounces to cups.

OuncesCups
1 oz0.23 cups
2 oz0.45 cups
3 oz0.68 cups
4 oz0.91 cups
5 oz1.13 cups
6 oz1.36 cups
8 oz1.81 cups
10 oz2.27 cups
12 oz2.72 cups

Icing Sugar Conversion Chart

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

ouncescupgramscup(US)tbsptsp
2.5 oz0.57 cup70.86 g0.59 cup (US)9.45 tbsp28.34 tsp
5 oz1.13 cup141.72 g1.18 cup (US)18.9 tbsp56.69 tsp
7.5 oz1.7 cup212.59 g1.77 cup (US)28.34 tbsp85.03 tsp
10 oz2.27 cup283.45 g2.36 cup (US)37.79 tbsp113.38 tsp

Frequently Asked Questions

How many cups is 1 ounce of icing sugar?
1 ounce of icing sugar is 0.23 cups. The ratio is fixed, so 2 ounces of icing sugar is 0.45 cups and 0.5 ounces is 0.11 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 icing sugar converter
How many cups is 1.5 ounces of icing sugar?
1.5 ounces of icing sugar is 0.34 cups. The ratio is fixed, so 1 ounce of icing sugar is 0.23 cups and 2 ounces is 0.45 cups. Type any other amount into the converter above for the exact figure, or use the chart below for the common ones.
How many cups is 2 ounces of icing sugar?
2 ounces of icing sugar is 0.45 cups. Conversions scale in a straight line, so halving or doubling a recipe keeps the same ratio. 1 ounce of icing sugar is 0.23 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 ounces of icing sugar is 0.23 cups?
0.23 cups of icing sugar is 1.01 ounces. The conversion works the same in reverse, so you can switch between cups and ounces without changing the result. This helps when a recipe lists ounces 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 ounce of Powdered Sugar?
Powdered Sugar is another name for icing sugar, so 1 ounce of Powdered Sugar is 0.23 cups, exactly the same as icing sugar. The figure does not change with the name: 2 ounces is 0.45 cups and 0.5 ounces is 0.11 cups. Use the converter above for any quantity, or read the conversion chart on this page for the most common amounts.

Other Ingredients

If you need help with any other ingredients click below: