The millimetre (SI symbol: mm; international spelling) or millimeter (American spelling) is a unit of length in the International System of Units (SI), equal to one thousandth of a metre, the SI base unit of length.

A millimeter (mm) is a unit of measurement. It forms part of the metric system and, although this isn’t the dominant system in the US, you’ll likely use mm units a lot.

The symbol of a millimeter is “mm.” In case you are wondering how to measure length in millimeters or how a length of a millimeter or 1 mm looks like, let’s check it out on a ruler.

Millimeters Abbreviation/Symbol: mm mil (informal) Unit of: Length Worldwide use: Millimeters are widely used as a unit of measurement across the globe due to their versatility and precision. This metric unit is commonly used in various fields, including engineering, manufacturing, construction, and science.

Instant free online tool for millimeter to centimeter conversion or vice versa. The millimeter [mm] to centimeter [cm] conversion table and conversion steps are also listed. Also, explore tools to convert millimeter or centimeter to other length units or learn more about length conversions.

The millimeter [mm] to inch [in] conversion table and conversion steps are also listed. Also, explore tools to convert millimeter or inch to other length units or learn more about length conversions.

Welcome to how to Convert Metric Units of Length with Mr. J! Need help with mm, cm, m, and km conversions? You're in the right place!

A millimeter (mm) is a very small unit of length in the metric system. The word "millimeter" comes from two words: "milli" which means one thousandth, and "meter" which is the basic unit of length.

Millimeters to Inches (mm to inches) conversion calculator for length conversions with additional tables and formulas.

Rulers that have centimeters also usually have millimeter markers between the centimeters. 1 cm = 10 mm. The figure below shows rulers that have millimeter, centimeter, and inch markings.