54 cm is how many inches?

54 cm ≈ 21 Inches

In chemistry, you can do a conversion factor. See the image below:

(I'm very sorry, this picture has a typo, the 0.492701 In. should be 0.393701 In. I'm very sorry for this inconvience).

• Since we are doing a conversion factor, a unit has to be cancelled out. In this example, it is centimeters. We now, simply multiply across and solve for the answer in inches. Since we have a decimal, the number will be smaller.

Answer - 21 Inches.