how do you convert cm into mm?

There are 10 mm in every cm.

-John

To do any conversion, find the relationship between the two units. In this case,
1 cm = 10 mm

This gives you two conversion factors:
1 cm/10 mm and 10 mm/1 cm
and if look at the equation, you'll see that
1 cm/10 mm = 10 mm/1 cm = 1

To convert 3 cm into mm, multiply by a conversion factor:
3 cm × (10 mm/ 1cm) = 30 mm
note that the "cm" cancels out, leaving you with the answer in mm.

To convert 30 mm into cm, multiply by the other conversion factor:
30 mm × (1 cm/10 mm) = 3 cm
Again, some of the units cancel out, leaving you with the units you want.

1 cm = 10 mm

Cm Into Mm

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RE:
how do you convert cm into mm?

I mm=533 centimeters

7cm=70mm

times the number of cm by 10

multiply cm by 10 -----> mm

multiply the centimeters by 10.