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Sheet Metal Wire Gauge Sizes Chart Table

This page is all about knowing the thickness of various materials based on a Gauge Number. If you know the thickness, you can use it to figure out other useful things such as weight. These thicknesses vary based on what the material is. In general, as the gauge number increases, the thickness decreases.

These charts provide thickness by gauge size for the following materials:

- Standard Steel

- Galvanized Steel

- Stainless Steel

- Aluminum

- Zinc

- Birmingham Scale

Each was determined by a standard established by the appropriate bodies concerned with the material.

Access Gauge Sizes More Convenientyly With a Special Calculator

We'll present all the gauge size data in tabular form below, but before we do that, we wanted you to know about our G-Wizard CNC Calculator. This inexpensive software has built-in gauge size information that's extremely easy to use:

Gauge Size in the G-Wizard Machinist's Calculator...

All the standard materials are available...

It's accessed by clicking the "Sheet Metal Gauge" button from within our standard Weights Calculator...

Standard Weights Calculator? What's all this then?

Simply put, it has the standard sizes for all the standard shapes you can obtain various materials in. It's all presented in a handy calculator that lets you figure weights and costs. Note that the Sheet Metal Gauge only appears when you select the "Rectangular" shapes.

Some things a free online chart just can't do! G-Wizard makes all this so easy you'll be reaching for your Machinery's Handbook way less often and loving it. Here's something else--you can get lifetime access to all the reference calculators and materials except the Feeds and Speeds Calculator just by signing up for a 30-Day Free Trial of G-Wizard. That's right, it is completely free to access all that just by signing up for a free trial and you'll also get all the upgrades and customer service for life! Plus, buy the $79 version and you get up to 1 HP on the Feeds and Speeds too for life.

So what's the catch? Why does anyone ever pay more than $79?

Many hobbyists don't pay more than $79, BTW. The catch is a spindle power limit. When you buy the 1 year G-Wizard for $79, you get 1 year of unlimited spindle power for Feeds and Speeds. When that expires, you get a spindle power limit of 1 HP. That limit is based on however many years you subscribe for. You can increase it any time you like by renewing the subscription. Or, if you don't like subscriptions, you can also by the product outright. And we never charge for updates or customer service.

Give G-Wizard a spin by taking the free 30-day trial today.

Sheet Metal Wire Gauge Sizes Chart

Okay, we promised free charts, so here they are:

Standard Steel Sheet Metal Gauges

Gauge inches mm
3 0.2391 6.0731
4 0.2242 5.6947
5 0.2092 5.3137
6 0.1943 4.9352
7 0.1793 4.5542
8 0.1644 4.1758
9 0.1495 3.7973
10 0.1345 3.4163
11 0.1196 3.0378
12 0.1046 2.6568
13 0.0897 2.2784
14 0.0747 1.8974
15 0.0673 1.7094
16 0.0598 1.5189
17 0.0538 1.3665
18 0.0478 1.2141
19 0.0418 1.0617
20 0.0359 0.9119
21 0.0329 0.8357
22 0.0299 0.7595
23 0.0269 0.6833
24 0.0239 0.6071
25 0.0209 0.5309
26 0.0179 0.4547
27 0.0164 0.4166
28 0.0149 0.3785
29 0.0135 0.3429
30 0.0120 0.3048
31 0.0105 0.2667
32 0.0097 0.2464
33 0.0090 0.2286
34 0.0082 0.2083
35 0.0075 0.1905
36 0.0067 0.1702
37 0.0064 0.1626
38 0.0060 0.1524

 

Galvanized Steel Sheet Metal Gauges

 

Gauge  inches   mm 
8      0.1681      4.2697
9      0.1532      3.8913
10      0.1382      3.5103
11      0.1233      3.1318
12      0.1084      2.7534
13      0.0934      2.3724
14      0.0785      1.9939
15      0.0710      1.8034
16      0.0635      1.6129
17      0.0575      1.4605
18      0.0516      1.3106
19      0.0456      1.1582
20      0.0396      1.0058
21      0.0366      0.9296
22      0.0336      0.8534
23      0.0306      0.7772
24      0.0276      0.7010
25      0.0247      0.6274
26      0.0217      0.5512
27      0.0202      0.5131
28      0.0187      0.4750
29      0.0172      0.4369
30      0.0157      0.3988
31      0.0142      0.3607
32      0.0134      0.3404

 

Stainless Steel Sheet Metal Gauges

Gauge
 inches 
 mm 
0000000      0.5000    12.7000
000000      0.4686    11.9024
00000      0.4375    11.1125
0000      0.4063    10.3200
000      0.3750      9.5250
00      0.3438      8.7325
0      0.3125      7.9375
1      0.2813      7.1450
2      0.2656      6.7462
3      0.2500      6.3500
4      0.2344      5.9538
5      0.2187      5.5550
6      0.2031      5.1587
7      0.1875      4.7625
8      0.1719      4.3663
9      0.1562      3.9675
10      0.1406      3.5712
11      0.1250      3.1750
12      0.1094      2.7788
13      0.0937      2.3800
14      0.0781      1.9837
15      0.0703      1.7856
16      0.0625      1.5875
17      0.0562      1.4275
18      0.0500      1.2700
19      0.0437      1.1100
20      0.0375      0.9525
21      0.0344      0.8738
22      0.0312      0.7925
23      0.0281      0.7137
24      0.0250      0.6350
25      0.0219      0.5563
26      0.0187      0.4750
27      0.0172      0.4369
28      0.0156      0.3962
29      0.0141      0.3581
30      0.0125      0.3175
31      0.0109      0.2769
32      0.0102      0.2591
33      0.0094      0.2388
34      0.0086      0.2184
35      0.0078      0.1981
36      0.0070      0.1778
37      0.0066      0.1676
38      0.0062      0.1575

Sheet Metal Tolerances

Steel sheet metal tolerances
Gauge Nominal
[in (mm)]
Max
[in (mm)]
Min
[in (mm)]
10 0.1345 (3.42) 0.1405 (3.57) 0.1285 (3.26)
11 0.1196 (3.04) 0.1256 (3.19) 0.1136 (2.89)
12 0.1046 (2.66) 0.1106 (2.81) 0.0986 (2.50)
14 0.0747 (1.90) 0.0797 (2.02) 0.0697 (1.77)
16 0.0598 (1.52) 0.0648 (1.65) 0.0548 (1.39)
18 0.0478 (1.21) 0.0518 (1.32) 0.0438 (1.11)
20 0.0359 (0.91) 0.0389 (0.99) 0.0329 (0.84)
22 0.0299 (0.76) 0.0329 (0.84) 0.0269 (0.68)
24 0.0239 (0.61) 0.0269 (0.68) 0.0209 (0.53)
26 0.0179 (0.45) 0.0199 (0.51) 0.0159 (0.40)
28 0.0149 (0.38) 0.0169 (0.43) 0.0129 (0.33)
Aluminium sheet metal tolerances
Thickness
[in (mm)]
Sheet width
36 (914.4)
[in (mm)]
48 (1,219)
[in (mm)]
0.0180.028 (0.460.71) 0.002 (0.051) 0.0025 (0.064)
0.0290.036 (0.740.91) 0.002 (0.051) 0.0025 (0.064)
0.0370.045 (0.941.14) 0.0025 (0.064) 0.003 (0.076)
0.0460.068 (1.21.7) 0.003 (0.076) 0.004 (0.10)
0.0690.076 (1.81.9) 0.003 (0.076) 0.004 (0.10)
0.0770.096 (2.02.4) 0.0035 (0.089) 0.004 (0.10)
0.0970.108 (2.52.7) 0.004 (0.10) 0.005 (0.13)
0.1090.125 (2.83.2) 0.0045 (0.11) 0.005 (0.13)
0.1260.140 (3.23.6) 0.0045 (0.11) 0.005 (0.13)
0.1410.172 (3.64.4) 0.006 (0.15) 0.008 (0.20)
0.1730.203 (4.45.2) 0.007 (0.18) 0.010 (0.25)
0.2040.249 (5.26.3) 0.009 (0.23) 0.011 (0.28)
Stainless steel sheet metal tolerances
Thickness
[in (mm)]
Sheet width
36 (914.4)
[in (mm)]
48 (1,219)
[in (mm)]
0.0170.030 (0.430.76) 0.0015 (0.038) 0.002 (0.051)
0.0310.041 (0.791.04) 0.002 (0.051) 0.003 (0.076)
0.0420.059 (1.11.5) 0.003 (0.076) 0.004 (0.10)
0.0600.073 (1.51.9) 0.003 (0.076) 0.0045 (0.11)
0.0740.084 (1.92.1) 0.004 (0.10) 0.0055 (0.14)
0.0850.099 (2.22.5) 0.004 (0.10) 0.006 (0.15)
0.1000.115 (2.52.9) 0.005 (0.13) 0.007 (0.18)
0.1160.131 (2.93.3) 0.005 (0.13) 0.0075 (0.19)
0.1320.146 (3.43.7) 0.006 (0.15) 0.009 (0.23)
0.1470.187 (3.74.7) 0.007 (0.18) 0.0105 (0.27)

 

 

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