Sugars & Syrups
Convert cups of powdered sugar to grams
One cup of powdered sugar weighs about 120 g, and half a cup comes to roughly 60 g. Enter any amount below to convert it, or use the chart further down as a quick reference while you cook.
1 cup of powdered sugar =
120 g
- oz
- 4.23
- kg
- 0.12
- lb
- 0.265
Powdered Sugar: 120 g per US cup · FAO / INFOODS density database. Unsifted powdered sugar traps lumps and air. Sifted it measures around 112 g per cup.
Full powdered sugar chart →Powdered Sugar at a glance
Every number on this page comes from a single figure: 120 grams per US cup (FAO / INFOODS density database).
- 1 cup
- 120 g
- 1 tablespoon
- 7.5 g
- 1 teaspoon
- 2.5 g
- 1 cup in ounces
- 4.23 oz
- 100 g in cups
- 0.833 cups
- Density
- 0.51 g/ml
cups to grams chart for powdered sugar
Print it, screenshot it, or bookmark this page — these are the amounts recipes ask for most often.
| Cups (US) | Grams | Ounces (weight) | Pounds |
|---|---|---|---|
| 1/8 cup | 15 g | 0.529 oz | 0.033 lb |
| 1/4 cup | 30 g | 1.06 oz | 0.066 lb |
| 1/3 cup | 40 g | 1.41 oz | 0.088 lb |
| 1/2 cup | 60 g | 2.12 oz | 0.132 lb |
| 2/3 cup | 80 g | 2.82 oz | 0.176 lb |
| 3/4 cup | 90 g | 3.17 oz | 0.198 lb |
| 1 cup | 120 g | 4.23 oz | 0.265 lb |
| 1 1/2 cup | 180 g | 6.35 oz | 0.397 lb |
| 2 cup | 240 g | 8.47 oz | 0.529 lb |
| 3 cup | 360 g | 12.7 oz | 0.794 lb |
| 4 cup | 480 g | 16.9 oz | 1.06 lb |
How this conversion is calculated
Volume-to-weight conversions are only as good as the density behind them. We treat powdered sugar as 120 g per US customary cup, which works out to 0.507 g/ml. From there:
- Your cups figure is converted into millilitres or grams using standard unit sizes (cup = 237 ml).
- The density above bridges volume and weight in whichever direction you need.
- The result is rounded the way a cook would round it — to the nearest gram, or to a usable fraction such as 7/8 cups.
Measuring powdered sugar accurately
Unsifted powdered sugar traps lumps and air. Sifted it measures around 112 g per cup.
If a recipe matters to you — bread, macarons, anything with a tight hydration or ratio — weigh it. A £10 digital scale removes the single largest source of variation in home baking, and it is faster than washing three measuring cups.
When cups are fine
- Liquids measured in a proper jug, where volume is the honest unit anyway.
- Forgiving savoury cooking: soups, stews, stir-fries, marinades.
- Small amounts of leaveners and spices, as long as you use level spoons.
Frequently asked questions
How many grams are in 1 cup of powdered sugar?
1 cup of powdered sugar is 120 g. This is based on a density of 120 g per US cup.
How many grams are in 2 cups of powdered sugar?
2 cups of powdered sugar is 240 g, and 60 g for half a cup.
How much is 100 g of powdered sugar in cups?
100 g of powdered sugar is about 7/8 cups. Weight is always the more reliable measurement, so use a scale when the recipe gives grams.
Why do other sites give a different number for powdered sugar?
Unsifted powdered sugar traps lumps and air. Sifted it measures around 112 g per cup.
Do UK and Australian cups give the same result?
No. A US customary cup is 236.6 ml, a metric cup used in Australia and New Zealand is 250 ml, and an old UK imperial cup is 284 ml. Our default is the US cup, but you can pick metric cups in the converter.