basic unit conversion

1mm = 0.1cm
1mm= 0.00328 ft
1mm = 0.3937 inch
1mm= 0.001 m

1cm= 10 mm
1cm= 0.393701 inch
1cm= 0.0328084 ft
1cm= 0.01m

1inch= 25.4 mm
1inch= 2.54 cm
1inch= 0.0833333 ft
1inch= 0.0254 m

1ft= 304.8 mm
1ft= 30.48cm
1ft= 12 inch
1ft =  0.3048 m

1m=1000 mm
1m= 100 cm
1m= 39.3701 inch
1m= 3.28 ft
1m= 1.09361 yard

1km= 1000 m
1km= 100000 cm

1mile= 1.60934 km
1mile= 1609.34 m