›› Measurement unit: mm

Full name: millimetre

Plural form: millimetres

Symbol: mm

Alternate spelling: millimeters

Category type: length

Scale factor: 0.001

›› Similar units


›› SI unit: metre

The SI base unit for length is the metre.
1 metre is equal to 1000 mm.

›› Convert mm to another unit

Convert mm to  

Valid units must be of the length type.
You can use this form to select from known units:

Convert mm to  

I'm feeling lucky, show me some random units

›› Definition: Millimeter

A millimetre (American spelling: millimeter, symbol mm) is one thousandth of a metre, which is the International System of Units (SI) base unit of length. The millimetre is part of a metric system. A corresponding unit of area is the square millimetre and a corresponding unit of volume is the cubic millimetre.

›› Sample conversions: mm

mm to rod [international]
mm to city block [South, West U.S.]
mm to foot [pre-1963 Canada]
mm to shaku
mm to nanometre
mm to bee space
mm to rood
mm to lieue [France, metric]
mm to alen [Danish]
mm to block [Midwest U.S.]