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millimeter (mm) → centimeter (cm)

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Use our free online converter to convert between units instantly. Enter any value in the field above to get accurate results. No signup or download required—all conversions run in your browser. Our calculator uses standard conversion factors for reliability.

0
mm=cm
0.01=0.001
0.1=0.01
1=0.1
2=0.2
3=0.3
5=0.5
10=1
20=2
50=5
100=10
1000=100

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Brief explanation: millimeter to centimeter

Length conversion multiplies by a factor. Meter is the base unit in the metric system. Kilometer = 1000 m, mile ≈ 1609 m. Foot = 0.3048 m, inch = 2.54 cm. The metric system (km, m, cm, mm) is used worldwide. The imperial system (mi, ft, in, yd) is common in the United States and United Kingdom. When converting, multiply the value by the appropriate factor—for example, to convert km to miles, multiply by 0.621371.

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Common conversion examples: millimeter to centimeter

Reference values for quick comparison. Use the converter above for any amount.

  • 1 millimeter=0.10 centimeter
  • 5 millimeter=0.50 centimeter
  • 100 millimeter=10 centimeter

About the Units

millimeter (mm)

Definition: A millimeter (mm) is a unit of length equal to one thousandth of a meter. There are 1,000 millimeters in one meter. The prefix milli- means one thousandth. It is used for precise measurements and small dimensions.
History: The millimeter became standard with the metric system. It allowed engineers and craftspeople to specify dimensions with precision without decimals. Manufacturing and machining rely heavily on millimeter tolerances.
Current use: Millimeters are used in engineering, manufacturing, and medicine. Sheet metal thickness, screw sizes, and medical measurements (e.g., tumor size) are often in millimeters. Rain gauges and rulers commonly use millimeter divisions.

centimeter (cm)

Definition: A centimeter (cm) is a unit of length equal to one hundredth of a meter. There are 100 centimeters in one meter. The prefix centi- means one hundredth. It is commonly used for measurements that fall between millimeters and meters.
History: The centimeter emerged with the metric system in late 18th-century France. It provided a convenient scale for human-scale measurements—body height, object dimensions—without the decimals required when using meters alone. It remains part of the SI system.
Current use: Centimeters are used for human height, clothing sizes, and small object dimensions. They appear on rulers and measuring tapes. In countries using the metric system, body measurements and craft dimensions are typically given in centimeters.

Sources

Conversion factors and unit definitions follow international standards. For authoritative references, see: