For Gauge Type For Gauge Type |
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System of Measurement System of Measurement |
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For Sheet Thickness For Sheet Thickness |
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For Wire Diameter For Wire Diameter |
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Material Material |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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For Sheet Metal Gauge For Sheet Metal Gauge |
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For Electrical Wire Gauge For Electrical Wire Gauge |
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Wire and Sheet Metal Size Identifiers

Read gauge numbers on one side of these identifiers and their decimal equivalents on the other.
American wire gauge identifier shows the same markings as Brown & Sharpe gauges.
U.S. steel wire gauge identifier shows the same markings as Washburn & Moen and American Steel and Wire Co. gauges.
For Gauge Type | For Use On | For Sheet Metal Gauge | For Electrical Wire Gauge | For Steel Wire Gauge | For Wire Dia./Sheet Thick. | Dia. | Each | |
Steel | ||||||||
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U.S. Standard Iron and Steel Gauge | Iron, Steel | 36 ga., 35 ga., 34 ga., 33 ga., 32 ga., 31 ga., 30 ga., 29 ga., 28 ga., 27 ga., 26 ga., 25 ga., 24 ga., 23 ga., 22 ga., 21 ga., 20 ga., 19 ga., 18 ga., 17 ga., 16 ga., 15 ga., 14 ga., 13 ga., 12 ga., 11 ga., 10 ga., 9 ga., 8 ga., 7 ga., 6 ga., 5 ga., 4 ga., 3 ga., 2 ga., 1 ga., 0 ga. | __ | __ | 0.007", 0.0078", 0.0085", 0.0093", 0.01", 0.0109", 0.0125", 0.014", 0.0156", 0.017", 0.0187", 0.0218", 0.025", 0.028", 0.0312", 0.0343", 0.0375", 0.0437", 0.05", 0.056", 0.0625", 0.07", 0.078", 0.0937", 0.109", 0.125", 0.14", 0.156", 0.172", 0.1875", 0.203", 0.2187", 0.234", 0.25", 0.263", 0.281", 0.3125" | 3 1/4" | 0000000 | 000000 |
American Wire Gauge | Aluminum, Brass, Copper | __ | 36 ga., 35 ga., 34 ga., 33 ga., 32 ga., 31 ga., 30 ga., 29 ga., 28 ga., 27 ga., 26 ga., 25 ga., 24 ga., 23 ga., 22 ga., 21 ga., 20 ga., 19 ga., 18 ga., 17 ga., 16 ga., 15 ga., 14 ga., 13 ga., 12 ga., 11 ga., 10 ga., 9 ga., 8 ga., 7 ga., 6 ga., 5 ga., 4 ga., 3 ga., 2 ga., 1 ga., 0 ga. | __ | 0.005", 0.0056", 0.0063", 0.007", 0.008", 0.009", 0.01", 0.011", 0.012", 0.014", 0.016", 0.018", 0.02", 0.022", 0.025", 0.028", 0.032", 0.036", 0.04", 0.045", 0.051", 0.057", 0.064", 0.072", 0.081", 0.091", 0.102", 0.114", 0.128", 0.144", 0.162", 0.182", 0.204", 0.229", 0.257", 0.289", 0.325" | 3 1/4" | 00000000 | 00000 |
U.S. Steel Wire Gauge | Steel | __ | __ | 36 ga., 35 ga., 34 ga., 33 ga., 32 ga., 31 ga., 30 ga., 29 ga., 28 ga., 27 ga., 26 ga., 25 ga., 24 ga., 23 ga., 22 ga., 21 ga., 20 ga., 19 ga., 18 ga., 17 ga., 16 ga., 15 ga., 14 ga., 13 ga., 12 ga., 11 ga., 10 ga., 9 ga., 8 ga., 7 ga., 6 ga., 5 ga., 4 ga., 3 ga., 2 ga., 1 ga., 0 ga. | 0.007", 0.0076", 0.0086", 0.0093", 0.0101", 0.0109", 0.0125", 0.014", 0.0156", 0.0172", 0.0187", 0.0218", 0.025", 0.0281", 0.0312", 0.0348", 0.0375", 0.0437", 0.05", 0.0562", 0.0625", 0.0703", 0.0781", 0.0937", 0.1093", 0.126", 0.1406", 0.1562", 0.1718", 0.1875", 0.2031", 0.2187", 0.2343", 0.25", 0.2656", 0.2812", 0.3125" | 3 1/4" | 00000000 | 00000 |