Ask Cook's: How much salt is in a stick of butter?

The exact amount of salt in butter varies from brand to brand, with a range of 1.25 to 1.75 percent by weight. Assuming an average of 1.5 percent, this works out to be about 1.7 grams of salt per 1/4-pound stick -- 1.7 grams measured by volume equals about 1/3 teaspoon.