1/2 cupClick to see full answer. Hereof, how much margarine is equal to a stick of butter?One stick of margarine or butter equals 1/2 cup.Additionally, how much is 1 stick of butter in a measuring cup? One stick of butter equals ½ cup. Additionally, how many grams is one stick of margarine? 113 grams How much is a cup of margarine? Butter or Margarine U.S. cups Grams 1/4 cup 55 grams 1/3 cup 75 grams 3/8 cup 85 grams 1/2 cup 115 grams