Gauge

Gauge may refer to:

Measurement

 * Gauge (instrument), any of a variety of measuring instruments
 * Gauge (firearms)
 * Wire gauge, a measure of the size of a wire
 * American wire gauge, a common measure of nonferrous wire diameter, especially electrical
 * Birmingham gauge, a measure of ferrous wire and hypodermic needle diameter
 * Jewelry wire gauge, the size of wire used in jewelry making
 * Sheet metal gauge, thickness of metal in sheet form
 * Film gauge, a physical property of film stock which defines its size
 * The size of objects used in stretching (body piercing), especially earrings
 * Gauge block, a metal or ceramic block 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
 * Gauge pressure, pressure above ambient pressure
 * 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
 * Gauger, one who gauges or measures, typically dutiable commodities, such as wine, landed from ships at docks

Railway practice

 * 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.
 * Axle load, the weight that an axle exerts on track
 * Variable gauge, system to allow railway vehicles to travel across a break of gauge

Medicine

 * Birmingham gauge, for metal wire and tube products
 * French gauge, mainly for catheters

Mathematics and physics

 * Gauge theory
 * Gauge integral
 * Gauge fixing
 * Gauge boson
 * Gauge (Minkowski functional)

Other uses

 * Gauge (knitting), the number of stitches in a given length
 * Gauge (actress), American pornographic actress
 * Gauge (band), post-hardcore band from Chicago, Illinois, USA
 * Gauge, Inc., a manufacturer of microphones and audio accessories
 * Change of gauge (aviation), when an aircraft type changes at a stopping point of a direct flight
 * Gauge (software), cross-platform test automation tool