cm to mm Converter - Centimeter to Millimeter

Centimeter (cm) to Millimeter (mm)

Direct answer

1 cm = 10 mm

mm = cm × 10

Converter

Input

Result

10mm

mm = cm × 10

cm = mm × 0.1

Example: 10 cm = 10 × 10 = 100 mm.

Express both cm and mm in the same base unit m (meter), then cancel the shared base unit.

1
Rewrite cm in the base unit
$1 cm = 0.01 m$
2
Rewrite mm in the base unit
$1 mm = 0.001 m$
3
Forward conversion
$1 cm = \frac{0.01 m}{0.001 m} \times 1 mm = \frac{0.01}{0.001} mm = 10 mm$
4
Reverse conversion
$1 mm = \frac{0.001 m}{0.01 m} \times 1 cm = \frac{0.001}{0.01} cm = 0.1 cm$

A guarded explanation for this pair page covering definition, principle, assumptions, and cautions.

Guarded output

AI text is for interpretation only. The page calculator remains the source of truth for numeric results.

1 cm = 10 mm.

10 cm = 100 mm.

100 cm = 1,000 mm.

Use mm = cm × 10.

1 mm = 0.1 cm.

Use the conversion factor and round the result to the precision required by your calculation.