How to convert butter
Our reference is 226.7962 grams per US reference cup of butter, us packaged butter; two 4 oz sticks per us cup. do not substitute melted for solid butter unless the recipe permits.. That works out to about 0.9586 grams per millilitre, so cups = grams ÷ 226.7962 and grams = cups × 226.7962 in US customary measures.
For metric and Australian recipes the cup holds 250 ml, so one cup of butter is about 239.65 grams. Australian tablespoons hold 20 ml rather than 15 ml, which the calculator handles when you pick that system.
Preparation changes the weight
The reference describes butter as: us packaged butter; two 4 oz sticks per us cup. do not substitute melted for solid butter unless the recipe permits.. A different form, such as sifted, packed, melted, chopped or cooked, can hold a different weight in the same cup and needs its own reference. When a recipe gives a gram amount, weigh that amount instead of converting.
Brand, moisture and how firmly the cup is filled all move the practical result. Treat the numbers here as recipe equivalents, not laboratory densities.
Where the number comes from
The reference comes from Land O'Lakes butter conversion table; NIST mass conversion, which lists 1 US stick = 4 oz = 1/2 US cup as 113.3981 grams. Package measure: 4 avoirdupois ounces per stick and two sticks per US cup. This site assigns the published cup weight to its adopted US reference cup of 236.5882365 ml; the source itself does not define an exact millilitre cup volume. Checked September 25, 2026.