How many cups is 4.5 tablespoons?

There are 0.1875 cups in 4.5 tablespoons. To calculate this, divide the number of tablespoons (4.5) by the number of tablespoons per cup (16). So, 4.5 tablespoons / 16 tablespoons/cup = 0.28125 cups. Since cups are typically measured in standard units, and this answer is slightly more than 1/8 cup, we can round our answer to 0.1875 cups.