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The word “gauge” is frequently used while working with sheet metal. The meaning of 18 gauge steel, for instance, may not be clear to someone who is not familiar with the gauge system. This blog includes a sheet metal gauge chart and an explanation of the gauge system as a resource.

How are Sheet Metal Gauges Used?

Gauges are used to specify a sheet metal’s thickness. The values of gauges are not reliant on either the metric or the standard measuring systems. The true thickness of sheet metal can be calculated in inches or millimeters using a gauge conversion chart. According to a gauge conversion chart, 18 gauge steel, for instance, equals 0.0478 inches or 1.214 millimeters. The gauge number “18” has no bearing on the measures themselves.

Various gauge systems are in use today, with particular gauge designations being used for particular metal kinds. For instance, under one gauge system, 18 gauge steel has a thickness of 0.0478 inches while 18 gauge aluminum has a thickness of 0.0403. A gauge chart should be used to make sure the metal fulfills the necessary dimensions because of the different thicknesses.

History of the Gauge System

Metal fabrication has a long history with the gauge system. Prior to the widespread adoption of standard and metric measurement systems, it most likely came from the British wire business. The diameter of the metal wire being pulled at the time was specified using gauges. Since that time, it has continued to be a common way to indicate the thickness of wire and sheet metal.

Sheet Metal Gauge Charts

Use these sheet metal gauge charts to determine the metal gauge you require:

Jump to:

Mild Steel Gauge Chart

Aluminum Gauge Chart

Stainless Steel Gauge Chart

Galvanized Steel Gauge Chart

Brass Gauge Chart

Copper Gauge Chart

Mild Steel Gauge Chart*
GaugeNumberInchesMM
7.17934.554
8.16444.175
9.14953.797
10.13453.416
11.11963.038
12.10462.656
14.07471.897
16.05981.518
18.04781.214
20.0359.911
22.0299.759
24.0239.607
26.0179.454
28.0149.378

Buy Mild Steel

Aluminum Gauge Chart*
GaugeNumberInchesMM
7.14433.665
8.12853.264
9.11442.906
10.10192.588
11.090742.305
12.080812.053
14.064081.628
16.050821.291
18.040301.024
20.03196.812
22.02535.644
24.02010.511
26.01594.405
28.01264.321
30.01003.255

Buy Aluminum

Stainless Steel Gauge Chart*
GaugeNumberInchesMM
8.171874.365
9.156253.968
10.140623.571
11.1253.175
12.109372.778
14.078121.984
16.06251.587
18.0501.270
20.0375.9525
22.03125.7937
24.025.635
26.01875.476
28.01562.396
30.0125.3175

Buy Stainless Steel

Galvanized Steel Gauge Chart*
GaugeNumberInchesMM
8.16814.269
9.15323.891
10.13823.510
11.12333.1318
12.10842.753
14.07851.9939
16.06351.6129
18.05161.310
20.03961.005
22.0336.853
24.0276.701
26.0217.551
28.0187.474
30.0157.398

Buy Galvanized Steel

Brass Gauge Chart*
GaugeNumberInchesMM
7.14433.665
8.12853.264
9.11442.906
10.10192.588
11.090742.305
12.080812.053
14.064081.628
16.050821.291
18.040301.024
20.03196.812
22.02535.644
24.02010.511
26.01594.405
28.01264.321
30.01003.255

Buy Brass

Copper Gauge Chart*
GaugeNumberInchesMM
7.1804.572
8.1654.191
9.1483.759
10.1343.404
11.1203.048
12.1092.769
14.0832.108
16.0651.651
18.0491.245
20.035.889
22.028.711
24.022.559
26.018.457
28.014.356
30.012.305

Buy Copper

Read More :

ISMC (Indian Standard Medium Channel) Weight chart: The Indian Standard Medium Channel (ISMC) is a weight chart used to calculate the weight of various steel products in India. The weights are calculated based on the dimensions of the products, such as width, height, and length.

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