
Here is how to convert 300 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 300 as a fraction is 300/1. Therefore, to get the fractional answer to 300 mm in inches, we multiply 300/1 by 5/127 and simplify if necessary.
cm × 5/127 = inches
300/1 × 5/127 = inches
300/1 × 5/127 = 11 103/127
300/1 mm = 11 103/127 inches
300 mm = 11 103/127 inches
As promised above, we also have the answer to 300 mm in inches in decimal form. Although the fractional answer above is exact, the decimal answer may be rounded if necessary:
11 103/127 ≈ 11.8110236220472
11 103/127 ≈ 11.81102
300 mm ≈ 11.81102 inches
Our image below shows 300 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 300 mm and 11.81102 inches meet on the measuring tape.
Millimeters to Inches Calculator
Here you can convert another length in millimeters to inches.
What is 300.1 mm in inches?
Here is another inches to millimeters calculation that we have done for you.