Steel Gauge
Sheet Steel Gauge Conversion Chart
The thickness of sheet metals is specified by gauge. The table below shows the actual thickness of sheet steel in millimetres and inches compared to gauge size. These dimensions vary slightly between different materials such as stainless steel and aluminium - but should be accurate enough for most everyday purposes.
| 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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