Here is how to convert 40 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 40 as a fraction is 40/1. Therefore, to get the fractional answer to 40 mm in inches, we multiply 40/1 by 5/127 and simplify if necessary.
cm × 5/127 = inches
40/1 × 5/127 = inches
40/1 × 5/127 = 1 73/127
40/1 mm = 1 73/127 inches
40 mm = 1 73/127 inches
As promised above, we also have the answer to 40 mm in inches in decimal form. Although the fractional answer above is exact, the decimal answer may be rounded if necessary:
1 73/127 ≈ 1.5748031496063
1 73/127 ≈ 1.57480
40 mm ≈ 1.57480 inches
Our image below shows 40 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 40 mm and 1.57480 inches meet on the measuring tape.
Millimeters to Inches Calculator
Here you can convert another length in millimeters to inches.
What is 40.1 mm in inches?
Here is another inches to millimeters calculation that we have done for you.