One stick of butter is equal to 4 ounces. There are 8 ounces in a cup and 16 tablespoons in a cup, which makes a stick of butter also equal to ½ cup. One stick of butter is also equal to 16 tablespoons.
The American Heart Association recommends consuming margarine products instead of real butter. It recommends selecting soft varieties of these margarine products that contain no more than 2 grams of fat per tablespoon-size serving. The AHA also suggests using natural oils, such as canola oil and olive oil, as a substitution when a recipe calls for real butter.