Standard Gauges
| Number of Gauge | Thickness in Inches |
|---|---|
| 10 | 0.1350 |
| 11 | 0.1205 |
| 12 | 0.1055 |
| 13 | 0.0915 |
| 14 | 0.0800 |
| 15 | 0.0720 |
| 16 | 0.0625 |
| 17 | 0.0540 |
| 18 | 0.0475 |
| 19 | 0.0410 |
| 20 | 0.0348 |
| 21 | 0.0317 |
| 22 | 0.0286 |
| 23 | 0.0258 |
| 24 | 0.0230 |
| 25 | 0.0204 |
| 26 | 0.0818 |
Fractional Inch → Decimal Feet
| Fraction (inches) | Inches (decimal) | Feet (decimal) | Notes / Typical Use |
|---|---|---|---|
| 1/16" | 0.0625 | 0.0052 | Fine tolerance, sheet gauge edges |
| 1/8" | 0.1250 | 0.0104 | Common plate/sheet gap |
| 3/16" | 0.1875 | 0.0156 | Structural fit-up, weld prep |
| 1/4" | 0.2500 | 0.0208 | Common plate/bar size |
| 5/16" | 0.3125 | 0.0260 | Structural plates |
| 3/8" | 0.3750 | 0.0313 | Tube wall, angle thickness |
| 7/16" | 0.4375 | 0.0365 | Less common fractional bar |
| 1/2" | 0.5000 | 0.0417 | Very common plate/bar |
| 9/16" | 0.5625 | 0.0469 | Pipe schedule match-up |
| 5/8" | 0.6250 | 0.0521 | Common rod/bar |
| 11/16" | 0.6875 | 0.0573 | Tube wall, plate stock |
| 3/4" | 0.7500 | 0.0625 | Common square tube, plate |
| 13/16" | 0.8125 | 0.0677 | Plate/flat bar tolerance |
| 7/8" | 0.8750 | 0.0729 | Tube/rod standard size |
| 15/16" | 0.9375 | 0.0781 | Plate/flat bar tolerance |
| 1" | 1.0000 | 0.0833 | Base unit (1 inch) |
| 1 ½" | 1.5000 | 0.1250 | Tube, angle, pipe OD reference |