mm to cm Converter - Millimeter to Centimeter

Millimeter (mm) to Centimeter (cm)

Direct answer

1 mm = 0.1 cm

cm = mm × 0.1

Converter

Input

Result

0.1cm

cm = mm × 0.1

mm = cm × 10

Example: 10 mm = 10 × 0.1 = 1 cm.

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

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

This pre-generated explanation is schema-checked. Numeric results still come from the page formula and calculator.

Pre-generated

This conversion factor is based on the metric system's definition of millimeters and centimeters as multiples of the base unit, the meter.

A millimeter (mm) is 0.001 meters, and a centimeter (cm) is 0.01 meters. The factor converts between these defined lengths.

Both units are derived from the meter. Dividing their factors relative to the meter gives the direct conversion: 0.001 m / 0.01 m = 0.1.

The definitions of millimeter and centimeter as 0.001 m and 0.01 m, respectively, are exact and universally applied.
The conversion is performed in a vacuum without environmental effects.

The factor is exact by definition, but practical measurements may have rounding errors.
Always round the result to the precision required by your calculation.

1 mm = 0.1 cm.

10 mm = 1 cm.

100 mm = 10 cm.

Use cm = mm × 0.1.

1 cm = 10 mm.

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