Source-matched reference
Ingredient weights by cup
Cups measure volume; grams measure mass. This table publishes only the 16 ingredient forms for which the cited chart has an exact one-cup row and a single gram value that can power the converter without an estimate, range choice, or scaled smaller-volume assumption.
Every value links to its source and shows the source's form verbatim. A similar ingredient name is not enough: sifted and unsifted sugar, packed and loose sugar, or whole and chopped nuts are different forms. See the editorial standards for the fail-closed publication rule.
Flours and meals
| Ingredient and exact source form | 1 US cup | Published row | Limit |
|---|---|---|---|
| All-Purpose FlourSource form: All-Purpose Flour | 120 g | King Arthur Baking chartAll-Purpose Flour · 1 cup · 4 1/4 oz · 120 gAccessed 2026-09-04 | The source row does not state a cup-filling method. Use a recipe's own gram weight when it supplies one. |
| Bread FlourSource form: Bread Flour | 120 g | King Arthur Baking chartBread Flour · 1 cup · 4 1/4 oz · 120 gAccessed 2026-09-04 | The source row does not state a brand-independent range or cup-filling method. |
| 100% Whole Wheat FlourSource form: Whole Wheat Flour (Premium 100%) | 113 g | King Arthur Baking chartWhole Wheat Flour (Premium 100%) · 1 cup · 4 oz · 113 gAccessed 2026-09-04 | Use only for the source's Premium 100% whole wheat flour form, not every whole-grain flour. |
| Almond FlourSource form: Almond Flour | 96 g | King Arthur Baking chartAlmond Flour · 1 cup · 3 3/8 oz · 96 gAccessed 2026-09-04 | The chart lists almond meal separately, so this value is not used for almond meal. |
| Oat FlourSource form: Oat Flour | 92 g | King Arthur Baking chartOat Flour · 1 cup · 3 1/4 oz · 92 gAccessed 2026-09-04 | Use for oat flour, not rolled, quick-cooking, or prepared oats, which the chart lists separately. |
| White Rice FlourSource form: Rice flour (white) | 142 g | King Arthur Baking chartRice flour (white) · 1 cup · 5 oz · 142 gAccessed 2026-09-04 | This source form is white rice flour; it does not cover brown or glutinous rice flour. |
| Quaker Yellow CornmealSource form: Cornmeal (yellow, Quaker) | 156 g | King Arthur Baking chartCornmeal (yellow, Quaker) · 1 cup · 5 1/2 oz · 156 gAccessed 2026-09-04 | This is the source's product-specific yellow Quaker row, not a value for whole cornmeal or polenta. |
Sugars
| Ingredient and exact source form | 1 US cup | Published row | Limit |
|---|---|---|---|
| Granulated White SugarSource form: Sugar (granulated white) | 198 g | King Arthur Baking chartSugar (granulated white) · 1 cup · 7 oz · 198 gAccessed 2026-09-04 | Use for granulated white sugar, not superfine, raw, or other sugar forms. |
| Packed Brown Sugar (Dark or Light)Source form: Brown sugar (dark or light, packed) | 213 g | King Arthur Baking chartBrown sugar (dark or light, packed) · 1 cup · 7 1/2 oz · 213 gAccessed 2026-09-04 | The source explicitly combines dark or light brown sugar and specifies packed handling. |
| Confectioners' Sugar (Unsifted)Source form: Confectioners' sugar (unsifted) | 113 g | King Arthur Baking chartConfectioners' sugar (unsifted) · 1 cup · 4 oz · 113 gAccessed 2026-09-04 | The source form is explicitly unsifted. Do not use this row for confectioners' sugar measured after sifting. |
Baking ingredients
| Ingredient and exact source form | 1 US cup | Published row | Limit |
|---|---|---|---|
| Unsweetened Shredded CoconutSource form: Coconut (unsweetened, shredded) | 53 g | King Arthur Baking chartCoconut (unsweetened, shredded) · 1 cup · 1 7/8 oz · 53 gAccessed 2026-09-04 | Use only for unsweetened shredded coconut, not sweetened, desiccated, toasted, or large-flake forms. |
Nuts
| Ingredient and exact source form | 1 US cup | Published row | Limit |
|---|---|---|---|
| Whole Unblanched AlmondsSource form: Almonds, whole (unblanched) | 142 g | King Arthur Baking chartAlmonds, whole (unblanched) · 1 cup · 5 oz · 142 gAccessed 2026-09-04 | Use for whole unblanched almonds, not sliced, slivered, meal, flour, or paste. |
| Chopped WalnutsSource form: Walnuts (chopped) | 113 g | King Arthur Baking chartWalnuts (chopped) · 1 cup · 4 oz · 113 gAccessed 2026-09-04 | Use for chopped walnuts; the chart lists whole walnuts separately at another volume. |
| Whole PecansSource form: Pecans (whole) | 105 g | King Arthur Baking chartPecans (whole) · 1 cup · 3 3/4 oz · 105 gAccessed 2026-09-04 | Use for whole pecans, not diced pecans or pecan meal. |
Fruit
| Ingredient and exact source form | 1 US cup | Published row | Limit |
|---|---|---|---|
| Loose RaisinsSource form: Raisins (loose) | 149 g | King Arthur Baking chartRaisins (loose) · 1 cup · 5 1/4 oz · 149 gAccessed 2026-09-04 | Use for loose raisins. The chart publishes a separate packed-raisin measure at a smaller volume. |
Vegetables
| Ingredient and exact source form | 1 US cup | Published row | Limit |
|---|---|---|---|
| Fresh Diced OnionsSource form: Onions (fresh, diced) | 142 g | King Arthur Baking chartOnions (fresh, diced) · 1 cup · 5 oz · 142 gAccessed 2026-09-04 | Use for fresh diced onions, not sliced, cooked, dried, or powdered onion. |
How to use the table
- Match the exact source form, not only the common ingredient name.
- Use a recipe or package gram weight instead when it is more specific.
- Multiply the published grams-per-cup value by the number of US customary cups.
- For a direct conversion, choose the ingredient in the converter and enter the amount.
Methodology and limitations
The public dataset is deliberately narrower than the old catalog. A record is public only when the source publishes the same ingredient form at one cup with one gram value. Comparator-only values, ranges, smaller-volume extrapolations, and inherited estimates do not power public answers.
The converter uses the US customary cup, 236.5882365 mL. That value is derived from the NIST Handbook 44 exact definitions: one US gallon is 231 cubic inches, one cup is one-sixteenth of that gallon, and one inch is exactly 2.54 centimeters. See NIST Handbook 44, Appendix C.
A source row may not state how a cup was filled. We do not silently add spooning, scooping, sifting, or packing unless those words appear in the source form. Current publication contract: The public form, source volume, and source mass reproduce the cited table row. No universal scooping, spooning, sifting, packing, brand, or preparation method is inferred beyond words present in that row.
Questions or corrections
A useful correction identifies the ingredient, exact form, household measure, mass, and a public source row or a reproducible measurement record. Read the publication and correction method or use the contact guidance.