Gauge Decimals in Inches
Please use this chart to convert Gauge Numbers into Inches for Steel Pipe and Tube.
The gauge size represents to wall thickness of a piece of steel tube. A higher number refers to a thinner wall. These gauge sizes are based on the Birmingham Wire Gauge and Stubs Wire Gauge standards. When ordering tube you can refer to the wall thickness in inches or gauge size.
| Gage no. | Gage Decimal |
|---|---|
| 00000 | .500 |
| 0000 | .454 |
| 000 | .425 |
| 00 | .380 |
| 0 | .340 |
| 1 | .300 |
| 2 | .284 |
| 3 | .259 |
| 4 | .238 |
| 5 | .220 |
| 6 | .203 |
| 7 | .180 |
| 8 | .165 |
| 9 | .148 |
| 10 | .134 |
| 11 | .120 |
| 12 | .109 |
| 13 | .095 |
| 14 | .083 |
| 15 | .072 |
| 16 | .065 |
| 17 | .058 |
| 18 | .049 |
| 19 | .042 |
| 20 | .035 |
| 21 | .032 |
| 22 | .028 |
| 23 | .025 |
| 24 | .022 |
| 25 | .020 |
| 26 | .018 |
| 27 | .016 |
| 28 | .014 |
| 29 | .013 |
| 30 | .012 |
| 31 | .010 |
| 32 | .009 |
| 33 | .008 |
| 34 | .007 |
| 35 | .005 |
| 36 | .004 |