Thickness Information - Online Metals

Thickness and Gauge Tables

Are you new to the world of making and fabrication? If so, this guide’s for you!

See our Thickness Table here

See our Gauge Conversion Table here

Thickness of material can be a rather abstract concept when you’re first getting started. So, we’ve put together a list of comparisons to help you get a sense for the thickness dimension of sheets, plates, rods and bars as you’re deciding what size materials are best suited for your project.

Thickness Comparison Table
Thickness	Imperial	Metric
Sheet of copier paper	.003 in	.07 mm
Dollar bill	.0043 in	.1 mm
Driver’s license / credit card thickness	.03 in	.76 mm
Standard paperclip (wire diameter)	.031 in	.78 mm
DVD-R	.047 in	1.19 mm
Dime	.053 in	1.35 mm
Penny	.059 in	1.52 mm
Quarter	.063 in	1.75 mm
Nickel	.074 in	1.95 mm
House key	.08 in	2 mm
Standard car windshield	.25 in	6.35 mm
iPhone	.27 - .29 in	6.85 – 7.36 mm
Samsung Galaxy	~.31 in	~7.87 mm
Standard tube ballpoint pen	.319 in	8.1 mm
Blu-ray case	.511 in	12.97 mm
Height of Credit Card	2.125 in	53.98 mm
Width of credit card	3.37 in	85.6 mm

Another common question is about gauge thicknesses. This form of measurement is traditional in the United States, but it is older and is going out of common use here because it is non-linear and actually changes depending on the metal being used. Also, gauge thickness is actually a rough estimate. For mills that still make material based on gauges, it will slightly vary depending on the mill and the batch. For these reasons, we generally advise that you use imperial or metric measurements instead of gauges.

Gauge Conversion Table in Inches
Gauge	Tube	Alloy Steel	Aluminum	Stainless	Copper	Brass	Carbon Steel	Galvanized Steel
0	0.34	0.3125	0.3249	0.3125	0.34	0.3249	---	---
1	0.3	0.2901	0.2893	0.2813	0.3	0.2893	---	---
2	0.284	0.259	0.2576	0.266	0.284	0.2576	---	---
3	0.259	0.2391	0.2294	0.239	0.259	0.2294	0.2391	---
4	0.238	0.2242	0.2043	0.224	0.238	0.2043	0.2242	---
5	0.22	0.2092	0.1819	0.209	0.22	0.1819	0.2092	---
6	0.203	0.1943	0.162	0.194	0.203	0.162	0.1943	---
7	0.18	0.1793	0.1443	0.179	0.18	0.1443	0.1793	---
8	0.165	0.1644	0.1285	0.164	0.165	0.1285	0.1644	0.1681
9	0.148	0.1495	0.1144	0.15	0.148	0.1144	0.1495	0.1532
10	0.12	0.1196	0.1019	0.135	0.134	0.1019	0.1345	0.1382
11	0.109	0.1046	0.0907	0.12	0.12	0.0907	0.1196	0.1233
12	0.095	0.0897	0.0808	0.105	0.109	0.0808	0.1046	0.1084
13	0.083	0.0747	0.072	0.09	0.095	0.072	0.0897	0.0934
14	0.072	0.0673	0.064	0.075	0.083	0.064	0.0747	0.0785
15	0.065	0.0598	0.0571	0.067	0.072	0.0571	0.0673	0.0710
16	0.058	0.0538	0.0508	0.06	0.065	0.0508	0.0598	0.0635
17	0.049	0.0478	0.0453	0.054	0.056	0.0453	0.0538	0.0575
18	0.042	0.0418	0.0403	0.048	0.049	0.0403	0.0478	0.0516
19	0.035	0.0359	0.0359	0.042	0.043	0.0359	0.0418	0.0456
20	0.028	0.0299	0.032	0.036	0.035	0.032	0.0359	0.0396
21	0.025	0.0269	0.0285	0.033	0.032	0.0285	0.0329	0.0366
22	0.022	0.0239	0.0254	0.03	0.027	0.0254	0.0299	0.0336
23	0.02	0.0209	0.0226	0.027	0.025	0.0226	0.0269	0.0306
24	0.018	0.0179	0.0201	0.024	0.022	0.0201	0.0239	0.0276
25	0.016	0.0164	0.0179	0.021	0.02	0.0179	0.0209	0.0247
26	0.014	0.0149	0.0159	0.018	0.018	0.0159	0.0179	0.0217
27	0.013	0.0135	0.0142	0.016	0.016	0.0142	---	0.0202
28	0.012	0.012	0.0126	0.015	0.014	0.0126	0.0149	0.0187
29	0.01	0.0105	0.0113	0.014	0.013	0.0113	---	0.0172
30	0.009	0.0097	0.01	0.012	0.012	0.01	---	0.0157
31	0.01	0.0105	0.0089	0.011	0.011	0.0089	---	0.0142
32	0.009	0.0097	0.008	0.01	0.009	0.008	---	0.0134

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Thickness and Gauge Tables

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