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Gauge (US /ˈɡ/,[1] UK /ˈɡ/[1] or /ˈɡɔː/) may refer to:


  • Gauge (instrument), any of a variety of measuring instruments
  • Gauge blocks, metal blocks of precisely known dimension, used in measuring
  • Sight glass, also known as a water gauge, for measuring liquid level heights in storage tanks and pressure vessels
  • Boost gauge, a gauge used in conjunction with turbo-super-chargers
  • Pressure gauge or vacuum gauge (see pressure measurement)
  • Stream gauge for measuring height and discharge of a river or stream
  • Air core gauge, a type of rotary actuator often used in automotive instruments


Railway practice[edit]

  • Track gauge, the distance between the two rails forming a railway track
  • Loading gauge, the maximum width and height of vehicles (engines, loaded wagons, etc.).
  • Structure gauge, the minimum size of bridges, tunnels, platforms, etc.
    • always bigger than loading gauge
  • Axle load, the weight that an axle exerts on track
  • Variable gauge, system to allow railway vehicles to travel across a break of gauge


Other sizes[edit]

Mathematics and physics[edit]

Other uses[edit]

See also[edit]


  1. ^ a b "English pronunciation of "gauge"". Cambridge Dictionaries Online. Retrieved 2015-07-02.