
Here is how to convert 684 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 684 as a fraction is 684/1. Therefore, to get the fractional answer to 684 mm in inches, we multiply 684/1 by 5/127 and simplify if necessary.
cm × 5/127 = inches
684/1 × 5/127 = inches
684/1 × 5/127 = 26 118/127
684/1 mm = 26 118/127 inches
684 mm = 26 118/127 inches
As promised above, we also have the answer to 684 mm in inches in decimal form. Although the fractional answer above is exact, the decimal answer may be rounded if necessary:
26 118/127 ≈ 26.9291338582677
26 118/127 ≈ 26.92913
684 mm ≈ 26.92913 inches
Our image below shows 684 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 684 mm and 26.92913 inches meet on the measuring tape.
Millimeters to Inches Calculator
Here you can convert another length in millimeters to inches.
What is 684.1 mm in inches?
Here is another inches to millimeters calculation that we have done for you.