
Here is how to convert 680 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 680 as a fraction is 680/1. Therefore, to get the fractional answer to 680 mm in inches, we multiply 680/1 by 5/127 and simplify if necessary.
cm × 5/127 = inches
680/1 × 5/127 = inches
680/1 × 5/127 = 26 98/127
680/1 mm = 26 98/127 inches
680 mm = 26 98/127 inches
As promised above, we also have the answer to 680 mm in inches in decimal form. Although the fractional answer above is exact, the decimal answer may be rounded if necessary:
26 98/127 ≈ 26.7716535433071
26 98/127 ≈ 26.77165
680 mm ≈ 26.77165 inches
Our image below shows 680 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 680 mm and 26.77165 inches meet on the measuring tape.
Millimeters to Inches Calculator
Here you can convert another length in millimeters to inches.
What is 680.1 mm in inches?
Here is another inches to millimeters calculation that we have done for you.