How to Convert 86 mm to Inches

The abbreviation "mm" stands for a millimeter, which is a unit of length in the Metric (or International) system. One millimeter corresponds to one thousandth of a meter or one hundredth of a centimeter. In the United States, however, inches are the more widely used measurement of length. A conversion between these units is required for solving some math problems. Convert 86 mm with a few simple operations on a calculator.

• 1

  Use the relationship that 1 inch equals to 2.54 centimeters.

• 2

  Divide 86 millimeters by 10 to convert this length to centimeters: 86 /10 = 8.6 centimeters.

• 3

  Divide 8.6 centimeters by 2.54 to convert it to inches: 8.6 / 2.54 = 3.39 inches. The result of this conversion is rounded to the hundredth.