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.

Millimetre (mm), unit of length equal to 0.001 metre in the metric system and the equivalent of 0.03937

To make the conversion easier, you can use the millimeters to inches conversion calculator provided on this page. This tool will calculatate the value for you and also give the result in fractional form if …

The word is usually expressed as 'mm' and is considered to be equal to one-thousandth of a meter. The metric unit consists of meters, centimeters, millimeters, and inches.

The meaning of MILLIMETER is a unit of length equal to 1/1000 meter.

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.

Illustrated definition of Millimeter | Millimetre: A Metric measure of distance used for small lengths. The abbreviation is mm There are 1000 mm in one meter....

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.

Milli denotes a factor of one thousandth (1/1000th) which means that there are 1,000 millimeters in a meter. Select one of the millimeter conversions below: This table provides a summary of the Length …

Dec 11, 2025 · mm (metrology) Symbol for millimetre (millimeter), an SI unit of length equal to 10 −3 metres (meters). quotations