How much is 1/3 cup July 17, 2022 by John How many 1/3 cups are in 1 cup? i only have a 1/3 cup but need to measure 1 cup HELP!!!!!!! There are 3 1/3 cups in 1 cup. (1/3+1/3+1/3=3/3=1) How much is 1/3 cup