A millimetre is a unit of distance. A gram is a unit of mass. The two units are therefore incompatible.
6.3 centimeters equals 63 mm.
1000 mm equals one meter
1.5 cm equals 15 mm.
15 mm
6,800 mm
63 mm
457.2 mm.
84 mm ;-)
1 km equals 100,000 mm
It equals 35 mm.
About 66 mm (65.99).
three hundred mm.