A mm (millimetre) is one thousandth of a metre, i.e. 0.001 m.
A Mm (megametre, a valid unit but very seldom used) is one million metre, i.e. 1,000,000 m (or 1,000 km).
So, there are (1 Mm) / (1 mm) = (1,000,000 m) / (0.001 m) = 1,000,000 / 0.001 = 1,000,000,000 mm (one billion mm) in a Mm.
1 in = 25.4 mm. (150 mm)/(25.4 mm/in) = 5.9055 inches.
5 mm x 5 mm = 25 mm2
9 cm and 3 mm is equal to 93 mm.
25.4 mm in an inch
20mm
369 mm is 14.53 mm
153 mm
180 mm
100 mm
6450 mm
135 mm.
304.8 mm