Here is how to convert 31 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 31 as a fraction is 31/1. Therefore, to get the fractional answer to 31 mm in inches, we multiply 31/1 by 5/127 and simplify if necessary.
cm × 5/127 = inches
31/1 × 5/127 = inches
31/1 × 5/127 = 1 28/127
31/1 mm = 1 28/127 inches
31 mm = 1 28/127 inches
As promised above, we also have the answer to 31 mm in inches in decimal form. Although the fractional answer above is exact, the decimal answer may be rounded if necessary:
1 28/127 ≈ 1.22047244094488
1 28/127 ≈ 1.22047
31 mm ≈ 1.22047 inches
Our image below shows 31 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 31 mm and 1.22047 inches meet on the measuring tape.
Millimeters to Inches Calculator
Here you can convert another length in millimeters to inches.
What is 31.1 mm in inches?
Here is another inches to millimeters calculation that we have done for you.