Wire and Sheet Metal Gauges

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Wire and Sheet Metal Gauges

NOTE: The "Approx. Thickness" shown is the "Manufacturers' Standard" of the American Iron and Steel Institute, based on steel as weighing 501.81 lb. per cu. ft. (489.6 true weight plus 2.5% for average over-run in area and thickness).

The AISI standard nomenclature for flat rolled carbon steel is shown at the bottom of the page.

Name of Gage	United States Standard Gage		United States Steel Wire Gage	American or Brown and Sharp Wire Gage	New Birmingham Standard Sheet and Hoop Gage	British Imperial or English Legal Standard Wire Gage	Birmingham or Stubs Iron Wire Gage
Pricipal Use	Uncoated Steel Sheets and Light Plates		Steel Wire (except music wire)	Non-Ferrous Sheets and Wire	Iron and Steel Sheets and Hoops	Wire	Strips, Bands, Hoops, and Wire
Gage No.	Weight (oz. per sq. ft.)	Approx. Thickness (in.)	Thickness (in.)
⁷/₀'s			.4900		.6666	.5000
⁶/₀'s			.4615	.5800	.6250	.4640
⁵/₀'s			.4305	.5165	.5883	.4320	.5000
⁴/₀'s			.3938	.4600	.5416	.4000	.4540
³/₀'s			.3625	.4096	.5000	.3720	.4250
²/₀'s			.3310	.3648	.4452	.3480	.3800
¹/₀'s			.3065	.3249	.3964	.3240	.3400
1			.2830	.2893	.3532	.3000	.3000
2			.2625	.2576	.3147	.2760	.2840
3	160	.2391	.2437	.2294	.2804	.2520	.2590
4	150	.2242	.2253	.2043	.2500	.2320	.2380
5	140	.2092	.2070	.1819	.2225	.2120	.2200
6	130	.1943	.1920	.1620	.1981	.1920	.2030
7	120	.1793	.1770	.1443	.1764	.1760	.1800
8	110	.1644	.1620	.1285	.1570	.1600	.1650
9	100	.1495	.1483	.1144	.1398	.1440	.1480
10	90	.1345	.1350	.1019	.1250	.1280	.1340
11	80	.1196	.1205	.0907	.1113	.1160	.1200
12	70	.1046	.1055	.0808	.0991	.1040	.1090
13	60	.0897	.0915	.0720	.0882	.0920	.0950
14	50	.0747	.0800	.0641	.0785	.0800	.0830
15	45	.0673	.0720	.0571	.0699	.0720	.0720
16	40	.0598	.0625	.0508	.0625	.0640	.0650
17	36	.0538	.0540	.0453	.0556	.0560	.0580
18	32	.0478	.0475	.0403	.0495	.0480	.0490
19	28	.0418	.0410	.0359	.0440	.0400	.0420
20	24	.0359	.0348	.0320	.0392	.0360	.0350
21	22	.0329	.0317	.0285	.0349	.0320	.0320
22	20	.0299	.0286	.0253	.0313	.0280	.0280
23	18	.0269	.0258	.0226	.0278	.0240	.0250
24	16	.0239	.0230	.0201	.0248	.0220	.0220
25	14	.0209	.0204	.0179	.0220	.0200	.0200
26	12	.0179	.0181	.0159	.0196	.0180	.0180
27	11	.0164	.0173	.0142	.0175	.0164	.0160
28	10	.0149	.0162	.0126	.0156	.0148	.0140
29	9	.0135	.0150	.0113	.0139	.0136	.0130
30	8	.0120	.0140	.0100	.0123	.0124	.0120
31	7	.0105	.0132	.0089	.0110	.0116	.0100
32	6.5	.0097	.0128	.0080	.0098	.0108	.0090
33	6	.0090	.0118	.0071	.0087	.0100	.0080
34	5.5	.0082	.0104	.0063	.0077	.0092	.0070
35	5	.0075	.0095	.0056	.0069	.0084	.0050
36	4.5	.0067	.0090	.0050	.0061	.0076	.0040
37	4.25	.0064	.0085	.0045	.0054	.0068
38	4	.0060	.0080	.0040	.0048	.0060
39			.0075	.0035	.0043	.0052
40			.0070	.0031	.0039	.0048

The AISI standard nomenclature for flat rolled carbon steel.

Thickness (in).	Width (in).
Thickness (in).	To 3½ incl.	Over 3½ to 6	Over 6 to 8	Over 8 to 12	Over 12 ro 48	Over 48
0.2300 & thicker	Bar	Bar	Bar	Plate	Plate	Plate
0.2299 to 0.2031	Bar	Bar	Strip	Strip	Sheet	Plate
0.2030 to 0.1800	Strip	Strip	Strip	Strip	Sheet	Plate
0.1799 to 0.0449	Strip	Strip	Strip	Strip	Sheet	Sheet
0.0448 to 0.0344	Strip	Strip	*	*	*	*
0.0343 to 0.0255	Strip	*	*	*	*	*
0.0254 & thinner	*	*	*	*	*	*

* Hot rolled sheet and strip not generally produced in these widths and thicknesses

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