Cups to grams converter
Convert recipe cups to grams, or work backward from a weight. Choose the ingredient and preparation that match your source, or enter your recipe’s own grams per cup.
Your ingredient conversion
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These are ingredient-specific estimates. Brand, preparation and measuring technique change a cup’s weight. If the recipe already gives grams, use those weights first. Displayed digits do not imply that a cup measurement is that precise.
Results are rounded to 10 significant digits for display; calculations use the unrounded inputs.
How to use cup weights in a real recipe
- Check whether the recipe supplies grams. Its tested ingredient weight is a better starting point than a general conversion chart.
- If only cups are given, match the ingredient, preparation and source. Packed brown sugar and unsifted confectioners’ sugar are different entries; do not use a flour factor for either.
- Enter the amount and direction. The result shows the exact factor used and the multiplication or division, so you can check the choice before weighing.
- For an unlisted ingredient or another cup convention, choose Custom. Weigh one recipe cup prepared the same way, or divide a recipe’s stated grams by its stated cups, then enter that grams-per-cup factor.
Worked examples
Using King Arthur’s all-purpose flour entry: 1 1/2 recipe cups × 120 g per recipe cup = 180 g. In reverse, 180 g ÷ 120 g per recipe cup = 1.5 recipe cups.
For the specific Bob’s Red Mill organic all-purpose flour entry, the same 1.5 recipe cups × 136 g per recipe cup = 204 g. The 24 g difference is a reason to follow the recipe’s source, not to average the two factors.
King Arthur lists unsweetened cocoa as 42 g for 1/2 cup. Dividing 42 by 0.5 gives the tool’s 84 g per recipe cup; 3/4 cup then gives 63 g.
When you need your own factor
If your recipe states 250 g for 2 cups, its factor is 125 g per recipe cup. Select Custom and enter 125; 3/4 of that recipe cup becomes 93.75 g. This example explains the arithmetic and is not a density claim for an ingredient.
Use the same cup, ingredient and filling method when measuring your own factor. A few repeated measurements can reveal variation. The tool does not estimate that variation or replace a scale’s accuracy limits.
Why the preparation matters
Why isn’t one cup always the same number of grams?
Cups measure volume and grams measure mass. Air gaps, particle size, moisture and packing change how much ingredient fits in a cup. A single conversion factor cannot cover every flour, sugar, nut or liquid.
Should I scoop or pack flour?
Follow the recipe’s method. King Arthur’s flour-measuring guidance uses fluffing, sprinkling into the cup and leveling rather than compacting flour. The packed label on brown sugar is intentional; do not transfer it to flour.
Does this convert a 250 mL cup into a US cup?
No. Presets retain the source’s recipe-cup convention without assigning an assumed milliliter size. If your recipe uses a different cup convention, use its gram weights or a custom factor measured for that cup. Choosing another language does not change the factors.
Can I use the oats or Bob’s flour factor for another product?
Only if the recipe or product guidance supports it. The 89 g oats entry is for old-fashioned or quick-cooking oats; King Arthur’s separate branded Rolled Oats entry has a different weight. Bob’s 136 g entry is specific to Organic Unbleached White All-Purpose Flour.
Ingredient references and source checks
The 10 presets below retain the original reference quantity. The converter derives grams per recipe cup by dividing reference grams by reference cups. Sources checked October 18, 2026.
| Ingredient and preparation | Reference grams | Reference cups | Grams per recipe cup |
|---|---|---|---|
| King Arthur: all-purpose flour | 120 | 1 | 120 |
| King Arthur: bread flour | 120 | 1 | 120 |
| King Arthur: almond flour | 96 | 1 | 96 |
| King Arthur: brown sugar, dark or light, packed | 213 | 1 | 213 |
| King Arthur: granulated white sugar | 198 | 1 | 198 |
| King Arthur: confectioners’ sugar, unsifted | 113 | 1 | 113 |
| King Arthur: cocoa, unsweetened | 42 | 0.5 | 84 |
| King Arthur: oats, old-fashioned or quick-cooking | 89 | 1 | 89 |
| King Arthur: chocolate chips | 170 | 1 | 170 |
| Bob’s Red Mill: Organic Unbleached White All-Purpose Flour | 136 | 1 | 136 |
- King Arthur Baking ingredient weight chart
- Bob’s Red Mill flour weight chart
- King Arthur Baking: how to measure flour
Only the source links open external sites. Calculations run in your browser; ingredient selections, custom factors and results are not uploaded or saved.