1 cup powdered sugar in grams
Powdered sugar (confectioners') cups to grams converter
One cup of powdered (confectioners') sugar weighs 113 grams when scooped straight from the bag — the convention King Arthur Baking documents and what most US recipes assume. Sifting the same sugar makes it lighter and drops the weight to about 100 g per cup, the value the Doves Farm chart uses for icing sugar. The ~12% gap between unsifted and sifted is large enough to matter for icings and frostings, so the 'Why two numbers?' block below shows both.
Tool · Converter
Convert powdered sugar (confectioners') between cups and grams
Quick reference
Powdered sugar (confectioners') cups to grams chart
| Powdered sugar (confectioners') | in grams |
|---|---|
| 1/4 cup | 28 g |
| 1/3 cup | 38 g |
| 1/2 cup | 56 g |
| 2/3 cup | 75 g |
| 3/4 cup | 85 g |
| 1 cup | 113 g |
| 2 cups | 226 g |
| 1 tbsp | 7 g |
| 1 tsp | 2 g |
Values rounded to the nearest gram for amounts ≥ 1 g. Sources: King Arthur Baking ingredient weight chart; Doves Farm cups-to-grams table.
Convention
Two numbers? Here's why
Why two numbers? The cup-to-gram convention
Powdered sugar is very fine and full of air, so its cup weight depends heavily on whether it has been sifted. King Arthur Baking's ingredient weight chart lists Confectioners' sugar (unsifted) = 113 g/cup — what you get if you scoop the cup straight from the bag. Doves Farm's 'icing sugar' line is 100 g/cup, a closer match to the sifted state because UK icing sugar is typically used from a fine-milled bag without separate sifting. If your recipe says sift first, then measure, use 100 g/cup; otherwise the bag-scooped 113 g/cup is correct.
Printable
Quick-reference card
A one-page quick-reference card (~A6) for fridge or pantry. The card shows every fraction from 1/4 cup through 2 cups, plus tablespoon and teaspoon. Click Print card and the browser's print dialog opens with the card as the only visible element.
Sources
How we cross-checked these numbers
Each density value is cross-referenced against at least two independent published sources. When two sources disagree by more than 5%, both conventions are shown in the "Why two numbers?" block above instead of silently picking one.
- King Arthur Baking Co. — Ingredient Weight Chart (Confectioners' sugar, unsifted)
- Doves Farm — Cups to Grams Conversion Table (Icing Sugar)
Last reviewed: . Density values cross-referenced; see for source discrepancy notes.
Note on accuracy
KAF's chart only documents 'Confectioners' sugar (unsifted)' at 113 g/cup. Doves Farm's 'Icing Sugar' entry is 100 g/cup -- icing sugar in UK usage is typically used straight from a fine-milled bag (functionally similar to sifted US powdered sugar). The two sources differ by ~12%, above the PRD 5% threshold, so both conventions are shown. Default is unsifted (113 g/cup) because most US recipes assume powdered sugar is scooped directly from the bag; 'sifted, then measured' is rare unless explicitly called out.
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