
Here is how to convert 424.2 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 424.2 as a fraction is 2121/5. Therefore, to get the fractional answer to 424.2 mm in inches, we multiply 2121/5 by 5/127 and simplify if necessary.
cm × 5/127 = inches
2121/5 × 5/127 = inches
2121/5 × 5/127 = 16 89/127
2121/5 mm = 16 89/127 inches
424.2 mm = 16 89/127 inches
As promised above, we also have the answer to 424.2 mm in inches in decimal form. Although the fractional answer above is exact, the decimal answer may be rounded if necessary:
16 89/127 ≈ 16.7007874015748
16 89/127 ≈ 16.70079
424.2 mm ≈ 16.70079 inches
Our image below shows 424.2 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 424.2 mm and 16.70079 inches meet on the measuring tape.
Millimeters to Inches Calculator
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