
Here is how to convert 422.1 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 422.1 as a fraction is 4221/10. Therefore, to get the fractional answer to 422.1 mm in inches, we multiply 4221/10 by 5/127 and simplify if necessary.
cm × 5/127 = inches
4221/10 × 5/127 = inches
4221/10 × 5/127 = 16 157/254
4221/10 mm = 16 157/254 inches
422.1 mm = 16 157/254 inches
As promised above, we also have the answer to 422.1 mm in inches in decimal form. Although the fractional answer above is exact, the decimal answer may be rounded if necessary:
16 157/254 ≈ 16.6181102362205
16 157/254 ≈ 16.61811
422.1 mm ≈ 16.61811 inches
Our image below shows 422.1 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 422.1 mm and 16.61811 inches meet on the measuring tape.
Millimeters to Inches Calculator
Here you can convert another length in millimeters to inches.
What is 422.2 mm in inches?
Here is another inches to millimeters calculation that we have done for you.