The larger the gauge number the thinner the metal.
Steel sheet metal gauge thickness.
In most of the world sheet metal thickness is consistently specified in millimeters.
Commonly used steel sheet metal ranges from 30 gauge to about 7 gauge.
In the u s the thickness of sheet metal is commonly specified by a traditional non linear measure known as its gauge.
For example 18 gauge steel according to a gauge conversion chart is 0 0478 inch or 1 214 millimeter.
For other materials such as aluminum and brass the thicknesses will be different.
A gauge conversion chart can be used to determine the actual thickness of sheet metal in inches or millimeters.
Gauge to thickness chart gauge stainless galvanized sheet steel aluminum fraction inches mm inches mm inches mm inches mm 30 0 0125 0 33 0 0157 0 40 0 0120 0 30 0 0100 0 25.
Gauge to thickness chart click here for a printable pdf chart gauge.
The equivalent thicknesses differ for each gauge size standard which were developed based on the weight of the sheet for a given material.
Sheet metal thickness gauges for steel are based on a weight of 41 82 pounds per square foot per inch of thickness.