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Sheet Gauges Chart

Easily convert gauge numbers to inches or millimeters with our sheet gauge chart. Learn how to read the chart to identify sheet thickness by gauge and choose the right material for your needs.
GaugeMild SteelAluminumGalvanized SteelStainless Steel
30.23910.2294-0.25
40.22420.2043-0.2344
50.20920.1819-0.2187
60.19430.162-0.2031
70.17930.1443-0.1875
80.16440.12850.1680.1719
90.14950.11440.15320.1562
100.13450.10190.13820.1406
110.11960.09070.12330.125
120.10460.08080.10840.1094
130.08970.0720.09340.0937
140.07470.06410.07850.0781
150.06730.05710.0710.0703
160.05980.05080.06350.0625
170.05380.04530.05750.0562
180.04780.04030.05160.05
190.04180.03590.04560.0437
200.03590.0320.03960.0375
210.03290.02850.03660.0344
220.02990.02530.03360.0312
230.02690.02260.03060.0281
240.02390.02010.02760.025
250.02090.01790.02470.0219
260.01790.01590.02170.0187
270.01640.01420.02020.0172
280.01490.01260.01870.0156
290.01350.01130.01720.0141
300.0120.010.01570.0125
310.01050.00890.01420.0109
320.00970.0080.01340.0102
330.0090.0071-0.0094
340.00820.0063-0.0086
350.00750.0056-0.0078
360.0067--0.007
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