공학용 단위환산표 길이 단위 mm cm m km in feet yard mile mm 1 0.1 0.001 - 0.03937 - - - cm 10 1 0.01 - 0.393701 0.032808 - - m 1000 100 1 0.001 39.3701 3.28084 1.09361 - km - - 1000 1 - 3280.84 1093.61 0.621371 in 25.4 2.54 - - 1 0.083333 0.027778 - feet 304.8 30.48 0.3048 - 12 1 0.33333 - yard 914.4 91.44 0.9144 0.000914 36 3 1 0.000568 mile - - 1609.344 1.609344 - 5280 1760 1 면..