Metal Gauges

Use the chart below to convert standard gauge numbers in decimals of an inch for sheet steel, aluminum and stainless steel.

  Gauge #  

  Sheet Steel  

  Aluminum  

  Stainless Steel  

1—.2893 (7.3).2812 (7.1)
 2—.2576 (6.5).2656 (6.7)
 3.2391 (6.1).2294 (5.8).2500 (6.4)
 4.2242 (5.7).2043 (5.2).2344 (6.0)
 5.2092 (5.3).1819 (4.6).2187 (5.6)
 6.1943 (4.9).1620 (4.1).2031 (5.2)
 7.1793 (4.6).1443 (3.7).1875 (4.8)
 8.1644 (4.2).1285 (3.3).1719 (4.4)
 9.1495 (3.8).1144 (2.9).1562 (4.0)
 10.1345 (3.4).1019 (2.6).1406 (3.6)
 11.1196 (3.0).0907 (2.3).1250 (3.2)
 12.1046 (2.7).0808 (2.1).1094 (2.8)
 13.0897 (2.3).0720 (1.8).0937 (2.4)
 14.0747 (1.9).0641 (1.6).0781 (2.0)
 15.0673 (1.7).0571 (1.5).0703 (1.8)
 16.0598 (1.5).0508 (1.3).0625 (1.6)
 17.0538 (1.4).0453 (1.2).0562 (1.4)
 18.0478 (1.2).0403 (1.0).0500 (1.3)
 19.0418 (1.1).0359 (0.9).0437 (1.1)
 20.0359 (0.9).0320 (0.8).0375 (1.0)
 21.0329 (0.8).0285 (0.7).0344 (0.9)
 22.0299 (0.8).0253 (0.6).0312 (0.8)
 23.0269 (0.7).0226 (0.6).0281 (0.7)
 24.0239 (0.6).0201 (0.5).0250 (0.6)
 25.0209 (0.6).0179 (0.5).0219 (0.6)
 26.0179 (0.5).0159 (0.4).0187 (0.5)
 27.0164 (0.4).0142 (0.4)>.0172 (0.4)
 28.0149 (0.4).0126 (0.3).0156 (0.4)
 29.0135 (0.3).0113 (0.3).0141 (0.3)

Dimensions in inches (millimeters)