Butter Converter
A US stick is defined as 4 oz by weight, so a "cup" of butter means 227 g regardless of what it measures out at.
1 cup of…
| Substance | Density | 1 cup weighs / measures |
|---|---|---|
| Water | 1 g/ml | 236.5882 g |
| Milk (whole) | 1.03 g/ml | 243.6859 g |
| Flour (all-purpose) | 0.529 g/ml | 125.1552 g |
| Sugar (granulated) | 0.845 g/ml | 199.9171 g |
| Butter | 0.911 g/ml | 215.5319 g |
| Vegetable oil | 0.92 g/ml | 217.6612 g |
| Honey | 1.42 g/ml | 335.9553 g |
| Table salt | 1.217 g/ml | 287.9279 g |
| Rice (uncooked) | 0.85 g/ml | 201.1 g |
Why cup (US) to gram needs a substance
Cup (US)s measure volume and grams measure weight, so there is no single conversion factor between them. What bridges the two is density — how much a given volume of that particular substance weighs:
mass = volume × density
Water is the easy case: it is almost exactly 1 g/ml, so 1 ml of water weighs 1 g and the numbers look identical. Nothing else behaves that way — flour is about half as dense, and honey is nearly half again as dense.
Using this for recipes
Pick the ingredient from the list and the conversion uses a typical density for it. Dry ingredients are the least predictable: scooping flour straight from the bag can pack in 20% more than spooning it in gently, which is exactly why baking recipes prefer weights. If you have a density from a supplier or a label, choose Custom density and enter it.
Densities here are typical values for guidance. For anything where precision matters, weigh it.