Cups to grams converter
Cups are not a weight. A cup of flour and a cup of sugar weigh very different amounts, so this converter uses the typical weight of each ingredient.
Result
120 grams
Plain / all-purpose flour: about 120 g per US cup
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Why bakers weigh ingredients
Baking is chemistry. Two cups of flour can differ by 30 g depending on how you fill the cup, which changes how the cake or bread turns out. A digital scale removes the guesswork, and most professional recipes are written in grams for that reason.
Quick reference: grams per US cup
| Ingredient | 1 cup |
|---|---|
| Plain / all-purpose flour | 120 g |
| Bread flour | 127 g |
| Cake flour | 115 g |
| Self-raising flour | 120 g |
| Wholemeal / whole wheat flour | 120 g |
| Granulated sugar | 200 g |
| Caster (superfine) sugar | 200 g |
| Brown sugar (packed) | 213 g |
| Icing (powdered) sugar | 120 g |
| Butter | 227 g |
| Vegetable oil | 218 g |
| Honey | 340 g |
| Maple / golden syrup | 320 g |
| Milk | 245 g |
| Water | 240 g |
| Double / heavy cream | 238 g |
| Yoghurt | 245 g |
| Cocoa powder | 85 g |
| Cornflour / cornstarch | 120 g |
| Rolled oats | 90 g |
| Ground almonds | 96 g |
| Chocolate chips | 170 g |
Frequently asked questions
How many grams are in a cup of flour?
A US cup of plain (all-purpose) flour is about 120 g when spooned and levelled. Scooping straight from the bag packs it down and can weigh 140 g or more, which is why weighing is more reliable.
How many grams are in a cup of sugar?
A cup of granulated or caster sugar is about 200 g, packed brown sugar about 213 g and icing (powdered) sugar about 120 g.
Why does a cup of each ingredient weigh something different?
A cup measures volume, not weight. Light, airy ingredients like flour and cocoa weigh less per cup than dense ones like sugar, honey or butter.
What is the difference between a US cup and a metric cup?
A US cup is about 240 ml and a metric cup (used in Australia, New Zealand and Canada) is 250 ml. The calculator lets you choose either.
Are these conversions exact?
They are typical values. Brands, humidity and how you fill the cup change the weight, so treat them as a reliable guide and weigh when accuracy matters.