Mild Steel Gauge Thickness Chart
Reference chart for mild steel gauge thickness in both inches and millimeters. Use this chart for quick conversions and reference when specifying material thickness for your sheet metal projects.
Mild Steel Gauge Thickness Reference
| Gauge Number | Inches | MM |
|---|---|---|
| 7 | 0.179 | 4.55 |
| 8 | 0.164 | 4.17 |
| 9 | 0.149 | 3.80 |
| 10 | 0.135 | 3.42 |
| 11 | 0.120 | 3.04 |
| 12 | 0.105 | 2.66 |
| 14 | 0.075 | 1.90 |
| 16 | 0.060 | 1.52 |
| 18 | 0.048 | 1.21 |
| 20 | 0.036 | 0.91 |
| 22 | 0.030 | 0.76 |
| 24 | 0.024 | 0.61 |
| 26 | 0.018 | 0.45 |
| 28 | 0.015 | 0.38 |
Understanding Mild Steel Gauge Thickness
Gauge is a standard unit for measuring the thickness of mild steel sheets. Lower gauge numbers indicate thicker materials, while higher gauge numbers represent thinner sheets.
Gauges vary from material to material (i.e. 12 GA Mild Steel is not the same as 12 GA Aluminum or Stainless Steel).
Common Mild Steel Gauge Applications
12 Gauge Mild Steel is 2.66 mm (0.105 in) thick. It's used for heavy-duty applications, structures, and frames.
14 Gauge Mild Steel is 1.90 mm (0.075 in) thick. It's used for medium-duty applications, enclosures, housings.
16 Gauge Mild Steel is 1.52 mm (0.060 in) thick. It's used for light-duty applications, cabinets, covers.
Need Custom Mild Steel Parts?
RMFG specializes in custom sheet metal fabrication with precision cutting, bending, and finishing.
Get an Instant Quote