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Cups to Grams Converter: Flour, Sugar, Butter & More (Cups to g)
To convert cups to grams, multiply the number of cups by the ingredient’s density weight in grams: 1 US cup of all-purpose flour equals 120 grams, 1 cup of granulated white sugar equals 200 grams, 1 cup of unsalted butter equals 227 grams, and 1 cup of water or milk equals 240 grams. Because cups measure volume and grams measure weight, every ingredient converts differently based on how tightly packed or aerated it is in the measuring cup. Use the interactive calculator and comprehensive conversion tables below to convert any recipe from US customary cups to exact grams.
Interactive Cups to Grams Calculator
Converted Weight:
120 grams (g)
Jump to Weight Equivalents:
30g to Cups
50g to Cups
60g to Cups
100g to Cups
150g to Cups
200g to Cups
250g to Cups
300g to Cups
500g to Cups
Cups to Grams Master Conversion Chart
The table below provides exact gram measurements for the standard US customary cup fractions (1/8 cup through 2 cups) across major baking and cooking ingredients:
| Ingredient | 1/8 Cup | 1/4 Cup | 1/3 Cup | 1/2 Cup | 2/3 Cup | 3/4 Cup | 1 Cup | 2 Cups |
|---|---|---|---|---|---|---|---|---|
| All-Purpose Flour | 15 g | 30 g | 40 g | 60 g | 80 g | 90 g | 120 g | 240 g |
| Bread Flour | 16 g | 32 g | 42 g | 64 g | 85 g | 95 g | 127 g | 254 g |
| Cake Flour | 14 g | 29 g | 38 g | 57 g | 76 g | 86 g | 114 g | 228 g |
| Granulated Sugar | 25 g | 50 g | 67 g | 100 g | 133 g | 150 g | 200 g | 400 g |
| Brown Sugar (Packed) | 28 g | 55 g | 73 g | 110 g | 147 g | 165 g | 220 g | 440 g |
| Powdered Sugar | 15 g | 30 g | 40 g | 60 g | 80 g | 90 g | 120 g | 240 g |
| Butter (Salted/Unsalted) | 28 g | 57 g | 76 g | 113 g | 151 g | 170 g | 227 g | 454 g |
| Rolled Oats | 11 g | 23 g | 30 g | 45 g | 60 g | 68 g | 90 g | 180 g |
| Cocoa Powder | 11 g | 21 g | 28 g | 43 g | 57 g | 64 g | 85 g | 170 g |
| Water / Milk | 30 g | 60 g | 80 g | 120 g | 160 g | 180 g | 240 g | 480 g |
| Greek Yogurt | 31 g | 61 g | 82 g | 123 g | 163 g | 184 g | 245 g | 490 g |
| Honey / Molasses | 43 g | 85 g | 113 g | 170 g | 227 g | 255 g | 340 g | 680 g |
Why Cup Weights Differ: US vs. Metric vs. Imperial
When cooking with recipes from different countries, the definition of a “cup” varies significantly:
- US Customary Cup: 236.59 ml (commonly treated as 240 ml by the US FDA for nutrition labeling). Standard in American recipes.
- Metric Cup: Exactly 250 ml. Standardized across Australia, New Zealand, the United Kingdom, and South Africa. A metric cup yields approximately 5% to 6% more weight in grams than a US cup.
- Imperial Cup: 284.13 ml. Used in traditional British recipes prior to decimalization.
Frequently Asked Questions About Converting Cups to Grams
How many grams is 1 cup of flour?
One US cup of all-purpose flour weighs 120 grams when measured using the spoon-and-level method. If scooped directly from the bag, it compacts and can weigh between 140 and 150 grams.
How many grams is 1/2 cup of sugar?
One-half cup (1/2 cup) of granulated white sugar equals exactly 100 grams. For packed brown sugar, 1/2 cup equals 110 grams, and 1/2 cup of powdered sugar equals 60 grams.
How many grams is 1 stick of butter in cups?
One standard US stick of butter equals 1/2 cup, which weighs 113.4 grams (4 ounces or 8 tablespoons). Two sticks equal 1 cup (227 grams).
How do you convert grams back to cups?
To convert grams back to cups, divide the gram weight by the ingredient’s density weight per cup (for example: 200g sugar ÷ 200g/cup = 1 cup; 60g flour ÷ 120g/cup = 0.5 cups). You can also use our dedicated grams to cups converter.