Gauge (US , UK or ) may refer to:
Measurement
- Gauge (instrument), any of a variety of measuring instruments
- For gauges on a car dashboard, see Dashboard items
- Gauge blocks, metal blocks of precisely known length, used in measuring
- Gauge (bore diameter), the diameter of a shotgun barrel
- Wire gauge, a measurement of the cross-sectional area of a wire
- Unit of thickness used for thin plastics; 1 gauge = mil = inch = millimetre = 0.254 micrometre
- Sheet metal gauge, thickness of metal in sheet form
- 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
- Film gauge, a physical property of film stock which defines its size
- ANOVA gauge R&R, a statistical tool to measure variation arising from the measurement device and its operators
- Air core gauge, a type of rotary actuator often used in automotive instruments
- Needle gauge for comparing outer diameter of medical needles