The Key Rule
Volume-to-weight conversion depends on the ingredient, how it is prepared, and how tightly it is packed. For repeatable baking results, use the recipe’s stated weight whenever possible.
How to Measure
| Ingredient/type | Best approach | Why |
|---|---|---|
| Flour | Weigh; or spoon into cup and level | Scooping can compact flour |
| Granulated sugar | Weigh or level a volume measure | More consistent than many powders |
| Brown sugar | Follow recipe wording for packed/loose | Packing changes mass per cup |
| Butter | Use scale or package markings | Solid volume is awkward |
| Liquids | Use a jug at eye level | Read the meniscus/marking consistently |
| Small quantities | Use measuring spoons or a fine scale | Improves repeatability |
Useful Notes
- Sifted flour can occupy a different volume from unsifted flour.
- Chopped, grated and whole ingredients can have very different volume-to-weight relationships.
- Recipe publishers may use different cup standards.