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Gauge Reference Chart

Use the chart to determine the thickness in inches and the weight for various gauges.

Gauge Number	Nominal Thickness	Tolerance Hr-Hr P&O	Tolerance Cold Roll	Lbs. Per Sq. Ft.
		Min. - Max.	Min. - Max.
1"	1.000	.990 - 1.03		40.84
3/4	.7500	.740 - .780		30.63
5/8	.6250	.615 - .655		25.52
1/2	.5000	.490 - .530		20.42
3/8	.3750	.365 - .405		15.31
5/16	.3125	.302 - .342		12.76
1/4	.2500	.240 - .280		10.21
3/16	.1875	.177 - .217		7.66

Sheet Tolerances
4	.224	.217 - .233		9.375
5	.209	.202 - .218		8.750
6	.194	.186 - .203		8.125
7	.179	.171 - .187		7.500
8	.164	.156 - .172		6.875
9	.149	.141 - .157		6.250
10	.134	.126 - .142	.128 - .140	5.625
11	.119	.112 - .128	.114 - .126	5.000
12	.104	.097 - .113	.099 - .111	4.375
13	.089	.083 - .097	.085 - .095	3.750
14	.074	.068 - .082	.070 - .080	3.125
15	.067	.060 - .074	.062 - .072	2.812
16	.059	.053 - .067	.055 - .065	2.500
17	.054	.048 - .060	.050 - .058	2.250
18	.048	.042 - .054	.044 - .052	2.000
19	.041		.038 - .046	1.750
20	.036		.033 - .039	1.500
21	.032		.030 - .036	1.375
22	.030		.027 - .033	1.250
23	.026		.024 - .030	1.125
24	.024		.021 - .027	1.000
25	.020		.018 - .024	.875
26	.018		.016 - .020	.750
27	.016		.014 - .018	.688
28	.015		.013 - .017	.625

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