Here is how to convert 520.9 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 520.9 as a fraction is 5209/10. Therefore, to get the fractional answer to 520.9 mm in inches, we multiply 5209/10 by 5/127 and simplify if necessary.
cm × 5/127 = inches
5209/10 × 5/127 = inches
5209/10 × 5/127 = 20 129/254
5209/10 mm = 20 129/254 inches
520.9 mm = 20 129/254 inches
As promised above, we also have the answer to 520.9 mm in inches in decimal form. Although the fractional answer above is exact, the decimal answer may be rounded if necessary:
20 129/254 ≈ 20.507874015748
20 129/254 ≈ 20.50787
520.9 mm ≈ 20.50787 inches
Our image below shows 520.9 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 520.9 mm and 20.50787 inches meet on the measuring tape.
Millimeters to Inches Calculator
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