Divide any inch measurements by "12" to convert to linear feet. For example, if you measured the length or height of a particular wall or room at 225 inches, 225 divided by 12 equals 18.75 linear feet. There are 12 inches for every one linear foot.
Multiply any centimeter measurements by "0.033" to convert to linear feet. For example, if you measured a particular object in your home as having a length of 25 centimeters, 25 multiplied by 0.033 = 0.825 linear feet. One centimeter is equal to 0.033 linear feet.
Multiply any yard measurement by "3" to convert to linear feet. For example, if a particular wall or fence in your yard measured 12 yards, 12 multiplied by 3 equals 36 linear feet. There are 3 linear feet for every one yard.