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
Sizes 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
See also Gage (disambiguation) Gaige (disambiguation)