Here is how to convert 20 mm to inches. We will give you the fractional answer, the decimal answer, and illustrate the answer on our tape measure.
One millimeter is equal to 5/127 inches, and 20 as a fraction is 20/1. Therefore, to get the fractional answer to 20 mm in inches, we multiply 20/1 by 5/127 and simplify if necessary.
cm × 5/127 = inches
20/1 × 5/127 = inches
20/1 × 5/127 = 100/127
20/1 mm = 100/127 inches
20 mm = 100/127 inches
As promised above, we also have the answer to 20 mm in inches in decimal form. Although the fractional answer above is exact, the decimal answer may be rounded if necessary:
100/127 ≈ 0.78740157480315
100/127 ≈ 0.78740
20 mm ≈ 0.78740 inches
Our image below shows 20 mm on a tape measure. The top row of the tape measure is inches, and each mark on the bottom row is 1 millimeter (10 millimeter marks equal 1 centimeter).
As you can see, we drew a red line where 20 mm and 0.78740 inches meet on the measuring tape.
Millimeters to Inches Calculator
Here you can convert another length in millimeters to inches.
What is 20.1 mm in inches?
Here is another inches to millimeters calculation that we have done for you.