μm
See also: µM and Appendix:Variations of "mm"
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Translingual
[edit]Alternative forms
[edit]- um (proscribed)
Etymology
[edit]From μ- (“micro-”) + m (“metre”).
Symbol
[edit]μm
- (metrology) Symbol for micrometre (micrometer), an SI unit of length equal to 10−6 metres (meters).
- 2025 September 26, Grant Maloy Smith, “What Is a Strain Gauge Sensor and How Does It Work?”, in DEWESoft[1] (in English), archived from the original on 14 November 2025:
- A strain is usually expressed in μm/m (micrometer per meter), also known as microstrain, which has the symbol µε. You may also see “mV/V,” which refers to the output in millivolts per volt of excitation.