113 Grams Powdered Sugar in Cups
113 g of powdered sugar is 1 cup (spooned and levelled, King Arthur Baking). Granulated sugar ground to a fine powder with a little cornstarch. All the figures on this page are approximate conversions based on the King Arthur Baking value, so when a recipe really matters, verify with a kitchen scale.
Why grams to cups matters for powdered sugar
Most of the world's recipes are written in grams, and this page is the bridge back to cups for cooks who measure by volume. Most people think of sugar as a sweetener only, but in baking it is a structural ingredient. It competes with flour for water, delays gluten development, and caramelises to give colour and flavour. That is why the same cake can come out pale and tough one time and golden and tender the next: the sugar was measured differently. A kitchen scale turns a vague cup into an exact number, and once you bake with grams you will notice how much more consistent your results become.
Granulated sugar ground to a fine powder with a little cornstarch. It is used for icings, glazes, dusting and buttercream. That is why the question comes up so often: a recipe from a European cookbook, a video, or a friend abroad gives you grams, and your kitchen is set up for cups.
Powdered Sugar grams to cups conversion table
| Grams | Cups (decimal) | Nearest measure |
|---|---|---|
| 30 g | 0.27 cups | 1/4 cup |
| 60 g | 0.53 cups | 1/2 cup |
| 90 g | 0.8 cups | 3/4 cup |
| 113 g | 1 cups | 1 cup |
| 120 g | 1.06 cups | 1 cup |
| 180 g | 1.59 cups | 1 1/2 cups |
| 240 g | 2.12 cups | 2 cups |
| 250 g | 2.21 cups | 2 cups |
| 300 g | 2.65 cups | 2 1/2 cups |
| 360 g | 3.19 cups | 3 cups |
| 480 g | 4.25 cups | 4 cups |
| 500 g | 4.42 cups | 4 cups |
The decimal column is exact arithmetic from the 113 g per cup figure, while the nearest-measure column is what you would actually reach for in the kitchen. A value like 0.42 cups is not a useful instruction, so the table rounds it to the nearest practical measure, and the worked examples below show how to handle the in-between amounts without a calculator.
How the weight was measured
Spooned and levelled means spooning the ingredient into the measuring cup until it is heaped, then sweeping a straight knife across the top to level it off. Never scoop the cup through the bag or jar, and never tap the cup down, because both pack the ingredient and add weight.
The source for the 113 g per cup figure is King Arthur Baking, and the confidence in the value is high. King Arthur Baking publishes a standard ingredient weight chart that recipe developers use as a reference, and this page follows it exactly rather than averaging across sources, because an average of two different measuring methods is a number that matches nobody's cup. There is a dispute worth knowing about. King Arthur lists 113 g unsifted; sifted powdered sugar is about 100 g per cup because sifting adds air. Use the table above, which follows the same source, and your conversions will be consistent with the recipes on this site.
Worked examples
A recipe that calls for 250 g of powdered sugar
250 g divided by 113 g per cup is 2.21 cups, which is 2 cups. In practice that means a full cup plus a generous extra scoop, and the easiest way to get it right is to weigh 250 g on the scale rather than trying to measure 2.21 cups by volume. If you must use cups, measure 1 cup properly and then add about 137 g, which is roughly 1 1/4 cups.
A scale reading of 60 g
60 g of powdered sugar is 0.53 cups, or about 1/2 cup. This is the situation that comes up when you are following a recipe that gives some ingredients in grams and some in cups, or when you have weighed out a small amount for a sauce or a topping. Knowing that 60 g is 1/2 cup lets you skip the maths and get on with cooking.
Doubling a recipe written in grams
A recipe that uses 180 g of powdered sugar needs 1.59 cups, which is 1 1/2 cups. Doubling it means 360 g, or 3.19 cups, which is 3 cups. When you double by weight the ratio stays exact, which is the whole point of converting to grams in the first place: doubling cups by eye doubles the measuring error too.
When this conversion matters most
This conversion matters most when a recipe depends on sugar for more than sweetness. In candy making, sugar is heated to a precise temperature, and the amount decides whether you get soft fudge or hard toffee. In baking, sugar holds moisture and delays setting, so the wrong amount changes the bake time as well as the flavour. It also matters for anyone tracking sugar intake, because weighing gives a true number while a cup can hide an extra 20 g.
Common mistakes with powdered sugar
- Heaping the cup. A heaped cup of sugar can add 15 to 20 g. Always level the top with the back of a knife.
- Packing granulated sugar. Granulated sugar should be spooned and levelled, not packed. Packing is only for brown sugar, where it is part of the measurement.
- Swapping sugars cup for cup. Brown sugar, caster sugar and powdered sugar all weigh differently per cup, so swapping them by volume changes the recipe. Convert by weight instead.
- Forgetting that sugar is hygroscopic. Sugar absorbs moisture from the air, so a cup measured on a humid day can weigh slightly more. Keep sugar sealed and weigh it when precision matters.
Storage and handling
Airtight container, cool and dry, indefinitely. Keeping powdered sugar stored properly also keeps its weight per cup stable: an ingredient that has absorbed moisture from the air weighs more per cup than a dry one, so a sealed container is not just about freshness, it is about measurement accuracy too. If a bag has been open for months in a humid kitchen, the first thing to do before a precise bake is to weigh the ingredient rather than trusting the cup.
Frequently asked questions
How many cups is 113 g of powdered sugar?
113 g of powdered sugar is exactly 1 cup, measured spooned and levelled according to King Arthur Baking. That is the anchor for the whole table on this page: every other row is that figure divided or multiplied.
How many cups is 100 g of powdered sugar?
100 g of powdered sugar is 0.88 cups, which is closest to 1 cup. For a recipe that asks for 100 g, weighing is the honest answer, because 0.88 cups is not a measure any cup set offers, and estimating it by eye can be off by 10 g or more.
How do I measure powdered sugar without a scale?
Spooned and levelled means spooning the ingredient into the measuring cup until it is heaped, then sweeping a straight knife across the top to level it off. Never scoop the cup through the bag or jar, and never tap the cup down, because both pack the ingredient and add weight. That gives the closest result to 113 g per cup, but it is still an estimate: the honest answer is that a scale is the only way to know the exact weight, and a basic digital kitchen scale costs less than a bag of good flour.
Does powdered sugar always weigh the same per cup?
No. Brand, grind, moisture and how settled the container is all shift the weight by a few grams, and for flour the swing can be 20 g or more. The 113 g figure is the standard King Arthur Baking value for powdered sugar measured spooned and levelled, and it is the right default, but when a recipe is precise, weigh the ingredient and trust the scale over the cup.
Why do different websites give different weights for powdered sugar?
Because they are measuring different things. King Arthur lists 113 g unsifted; sifted powdered sugar is about 100 g per cup because sifting adds air. A source that scoops will always report a heavier cup than a source that spoons and levels, and both can be correct about their own method. The fix is to pick one source and one method and stick with it for the whole recipe.
How should I store powdered sugar?
Airtight container, cool and dry, indefinitely. Good storage keeps the ingredient fresh and keeps its weight per cup consistent, because moisture absorbed from the air adds grams that the recipe did not ask for.
What is powdered sugar used for?
Icings, glazes, dusting and buttercream. Granulated sugar ground to a fine powder with a little cornstarch.
Related conversions
Use the cups to grams converter or the grams to cups converter for instant answers, or browse the grams to cups hub for the full ingredient list. Related pages: Granulated Sugar in cups to grams, Brown Sugar in cups to grams, Honey in cups to grams, 1 cup of powdered sugar in grams. More tools: cups to grams converter, grams to cups converter, sugar substitute converter, weight converter. See also our disclaimer about approximate conversions.