Both millimeter (mm) and centimeter (cm) are metric units of length. A millimeter is one‑thousandth of a meter, while a centimeter is one‑hundredth of a meter.
In practice, millimeters are used for high‑precision engineering, machining tolerances, and PCB trace widths. Centimeters are common in everyday measurements, architectural drawings, and medium‑scale engineering sketches.
Conversion Relationship
The metric system is base‑10, so the conversion factor is straightforward:
\\(1\\text{ mm}=0.1\\text{ cm}\\)
To go from mm to cm, multiply by 0.1.
To go from cm to mm, multiply by 10.
Millimeter to Centimeter Conversion Reference Table
A millimeter is one‑thousandth of a meter (0.001 m) and is used for very fine measurements. A centimeter is one‑hundredth of a meter (0.01 m) and is suited for slightly larger, but still small‑scale, dimensions.
Since 1 mm = 0.1 cm, simply move the decimal point one place to the left. For example, 25 mm becomes 2.5 cm.
"On fait la science avec des faits, comme on fait une maison avec des pierres ; mais une accumulation de faits n'est pas plus une science qu'un tas de pierres n'est une maison." "Science is built up of facts, as a house is built of stones; but an accumulation of facts is no more a science than a heap of stones is a house." — Henri Poincaré (French Mathematician, Theoretical Physicist & Mining Engineer)