This conversion table will show us the exact values in decimal inches for every gauge for sheet steel, galvanized steel, stainless steel, aluminum and both strip and tubing. This is very essential when working or dealing with different kinds of steel and making numerous objects from it. Roll forming, steel gauge conversion and other metal tips from Corrugated Metals. Learn about the roll forming process or use a variety of easy to use charts to convert uncoated steel gauge to thickness and pounds per square inch, convert gauge to decimals of an inch for sheet steel, and more.... Use the chart provided below to convert standard gauge numbers in decimals of an inch for sheet steel, strip and tubing, aluminum and stainless steel. For more information about Advantage Fabricated Metals and the metal forming, metal fabricating, and welding services we provide, please fill out our contact form or call us at 1-815-323-1310. Gauge in decimals of an inch Use the chart provided below to convert standard gauge numbers in decimals of an inch for sheet steel, strip and tubing, aluminum and stainless steel. Gauge and weight chart for sheet steel, galvanized steel, stainless steel, aluminum and strip & tubing Sponsored Links Wire gauge is a measure for the size of a wire, either in diameter or in cross sectional area. A gauge conversion chart can be used to determine the actual thickness of sheet metal in inches or millimeters. For example, 18 gauge steel, according to a gauge conversion chart, is 0.0478 inch or 1.214 millimeter.