Sheet Metal Gauge Chart: Gauge Thickness Chart

If you are ever exposed to the sheet metal fabrication industry or working in similar industries, you may have heard about the term “Gauge.” Many of us do not understand when someone says 18 gauge steel or 16 gauge aluminum. In this article, we will learn about Sheet Metal Gauge Chart or simply the Gauge Thickness Chart.

What Is Sheet Metal Gauge Chart?

Manufacturers use sheet metal gauge charts, whereas designers use the material thickness in MM or Inches. So a sheet metal gauge chart basically shows the gauge to unit conversion data suitable for both manufacturers and designers. Sheet metal gauges are also called “Gage.”

Gauges were introduced well before any standards were in the picture. The British wire industries initially submitted it to standardize the diameter of wire is drawn. After that, it got wide acceptance all around the world.

The more the gauge number, the lower will be the thickness value. For example, 16 gauge of aluminum measures 1.29 mm, whereas 24 gauge aluminum measures 0.51 mm. The same rule is valid for all materials.

sheet metal gauge chart

One point must be noted that the thickness will be different for different materials for the same gauge. For example, the 16 gauge stainless steel thickness is 1.60 mm, whereas the 16 gauge aluminum thickness is 1.29 mm. It is essential to keep a copy of the gauge Chart handy when you design any part.

As the Gauge number increases, the sheet metal thickness decreases

Why Sheet Metal Gauge Chart Is Important?

Different countries use different units of measurements. For example, India follows units in MM, whereas the USA follows units in INCH. So it is hard for manufactures to understand and convert units when reading a drawing. Nowadays manufacturing industry is not limited to any specific region or country. So the gauge system provides a system of measurement that is universally accepted.

Disclaimer: This sheet metal gauge chart is prepared by compiling data from many reliable sources. But since every manufacturer uses a different and customized gauge chart based on their business, it is always advisable to check manufacturer-specific gauge charts while designing any part or assemblies.

Cold Rolled Close Annealed Steel (CRCA) Gauge Chart

Gauge #Thickness In MMThickness In Inches
36.07.238
45.69.224
55.31.209
64.94.194
74.55.179
84.18.164
93.80.149
103.40.133
113.00.118
122.66.104
132.28.089
141.90.074
151.70.066
161.50.059
171.37.053
181.20.047
191.10.043
200.90.035
210.84.033
220.76.029
230.68.026
240.60.023
250.53.020
260.45.017
270.40.015
280.38.014
290.34.013
300.30.011
310.27.010
320.25.009
330.23.009
340.21.008
350.19.007

Aluminum Gauge Chart

Gauge #Thickness In MMThickness In Inches
35.83.229
45.19.204
54.62.181
64.11.161
73.67.144
83.26.128
92.9.114
102.59.101
112.23.087
122.05.080
131.83.072
141.63.064
151.45.057
161.29.050
171.15.045
181.02.040
190.91.035
200.81.031
210.72.028
220.64.025
230.57.022
240.51.020
250.45.017
260.40.015
270.36.014
280.32.012
290.29.011
300.25.009
310.23.009
320.20.007
330.18.007
340.16.006
350.14.005

Stainless Steel Gauge Chart

Gauge #Thickness In MMThickness In Inches
55.55.181
65.16.203
74.76.187
84.19.164
93.97.156
103.57.140
113.18.125
122.78.109
132.38.093
142.078
151.79.070
161.6.060
171.43.056
181.27.050
191.10.043
200.95.037
210.87.034
220.79.031
230.70.027
240.60.023
250.56.022
260.47.018
270.44.017
280.40.015
290.36.014
300.32.012
310.28.011
320.26.010
330.24.009
340.22.008
350.2.007

Carbon Steel Gauge Chart

Gauge#Thickness in MMThickness in Inches
74.55.179
84.17.164
93.79.149
103.41.134
113.03.119
122.65.104
141.89.074
161.51.059
181.21.047
200.91.035
220.75.029
240.60.023
260.45.017
280.37.014

Galvanized Steel Gauge Chart

Gauge#Thickness in MMThickness in Inches
84.26.168
93.89.153
103.51.138
113.13.123
122.75.108
141.99.078
161.61.063
181.31.051
201.00.039
220.85.033
240.70.027
260.55.021
280.47.018
300.39.015

Brass Gauge Chart

Gauge#Thickness in MMThickness in Inches
73.66.144
83.26.128
92.90.114
102.58.101
112.30.090
122.05.080
141.62.064
161.29.050
181.02.040
200.81.031
220.64.025
240.51.020
260.40.015
280.32.012
300.25.010

Copper gauge Chart

Gauge#Thickness in MMThickness in Inches
74.57.180
84.19.165
93.75.148
103.40.134
113.04.120
122.76.109
142.10.083
161.65.065
181.24.049
200.88.035
220.71.028
240.55.022
260.45.018
280.35.014
300.30.012

Conclusion: Guage thickness Chart

So that is all that we have in this article. A gauge table is just a conversion table from gauge numbers to different thicknesses. You can use this gauge Chart table as a ready reference when you work on a design project.

If you have any questions on the sheet metal gauge chart, you are always welcome to write in the comment section, and I will be happy to respond.

You may also like to read:
1. Sheet Metal Rolling Process
2. What is bend allowance in sheet metal

Frequently Asked Questions on Sheet metal gauge chart (fAQ)

What is a sheet metal gauge chart

Sheet metal gauge chart is a conversion table that shows the thickness of sheet metal at different gauge sizes. Higher the gauge size, lower the sheet thickness

Do All manufacturers Use the same gauge chart?

Not necessarily. Many manufacturers use their customized gauge chart. But the values are more or less similar.

Why Manufacturers use a gauge chart?

It’s easy to communicate 14 gage sheet rather than 1.91 mm sheet. Right? So the communication is one of the reason of using a gauge chart. On the other hand, every country follow a different units of measurement. A gauge chart has conversion for all these different units. That is why gauge chart can be used as a standard chart all across the world which is more or less common

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