You can find the conversion of sheet metal specifications to millimeters per inch in the table below.
When working with sheet metal, the term "gauge" is often used. Gauges are used to specify the thickness of sheet metal.
The gauge (Ga.) is a unit of measurement for diameter and length that originated in North America and is part of the Browne & Sharpe system of measurement. Originally used in medicine and jewelry, the larger the number, the smaller the diameter, it is now also used to indicate thickness.
Ga. Unlike inches, there is no conversion formula. Even if non-ferrous sheet metal and steel plate are the same Ga., the thicknesses are actually different.
FAQ about Gauge Conversion
1) How many mm is 8 gauge?
For different materials of steel, the same gauge will also correspond to different mm.
Standard Steel: 8 Gauge = 4.176 mm
Stainless Steel: 8 Gauge = 4.191 mm
Aluminum, Brass, Copper: 8 Gauge = 4.115 mm
2)What is 10 gauge in mm?
Standard Steel: 10 Gauge = 3.416 mm Galvanized Steel: 10 Gauge = 3.51 mm
Stainless Steel: 10 Gauge = 3.571 mm
Aluminum, Brass, Copper: 10 Gauge = 2.588 mm
3)What is 16 gauge thickness in mm?
Standard Steel: 16 Gauge = 1.519 mm
Galvanized Steel: 16 Gauge = 1.613 mm
Stainless Steel: 16 Gauge = 1.588 mm
Aluminum, Brass, Copper: 16 Gauge = 1.29 mm
Gauge No
Inch
Metric
0
0.324"
8.2mm
1
0.300"
7.6mm
2
0.276"
7.0mm
3
0.252"
6.4mm
4
0.232"
5.9mm
5
0.212"
5.4mm
6
0.192"
4.9mm
7
0.176"
4.5mm
8
0.160"
4.1mm
9
0.144"
3.7mm
10
0.128"
3.2mm
11
0.116"
2.9mm
12
0.104"
2.6mm
13
0.092"
2.3mm
14
0.080"
2.0mm
15
0.072"
1.8mm
16
0.064"
1.6mm
17
0.056"
1.4mm
18
0.048"
1.2mm
19
0.040"
1.0mm
20
0.036"
0.9mm
21
0.032"
0.8mm
22
0.028"
0.7mm
23
0.024"
0.6mm
25
0.020"
0.5mm
26
0.018"
0.45mm
27
0.0164"
0.42mm
28
0.0148"
0.37mm
29
0.0136"
0.34mm
30
0.0124"
0.31mm
31
0.0116"
0.29mm
32
0.0108"
0.27mm
33
0.0100"
0.25mm
34
0.0092"
0.23mm
35
0.0084"
0.21mm
36
0.0076"
0.19mm
37
0.0068"
0.17mm
38
0.0060"
0.15mm
39
0.0052"
0.13mm
40
0.0048"
0.12mm
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