g is the unit weight and unit mm long, the two do not compare.
6.3 centimeters equals 63 mm.
1000 mm equals one meter
1.5 cm equals 15 mm.
1 km equals 100,000 mm
15 mm
6,800 mm
63 mm
457.2 mm.
84 mm ;-)
It equals 35 mm.
About 66 mm (65.99).
three hundred mm.