The term “gauge” is used in various fields such as needle diameter size, thickness of jewelry materials, and metal sheet thickness. Below are the corresponding values for metal sheets in Ga (Gauge) and Inch.
| Gauge(Ga) | Mild Steel (inch) | Galvanized Steel (inch) | Aluminum (inch) |
| 3 | 0.2391 | | 0.2294 |
| 4 | 0.2242 | | 0.2043 |
| 5 | 0.2092 | | 0.1819 |
| 6 | 0.1943 | | 0.162 |
| 7 | 0.1793 | | 0.1443 |
| 8 | 0.1644 | | 0.1285 |
| 9 | 0.1495 | 0.1532 | 0.1144 |
| 10 | 0.1345 | 0.1382 | 0.1019 |
| 11 | 0.1196 | 0.1233 | 0.0907 |
| 12 | 0.1046 | 0.1084 | 0.0808 |
| 13 | 0.0897 | 0.0934 | 0.072 |
| 14 | 0.0747 | 0.0785 | 0.0641 |
| 15 | 0.0673 | 0.071 | 0.0571 |
| 16 | 0.0598 | 0.0635 | 0.0508 |
| 17 | 0.0538 | 0.0575 | 0.0453 |
| 18 | 0.0478 | 0.0516 | 0.0403 |
| 19 | 0.0418 | 0.0456 | 0.0359 |
| 20 | 0.0359 | 0.0396 | 0.032 |
| 21 | 0.0329 | 0.0366 | 0.0285 |
| 22 | 0.0299 | 0.0336 | 0.0253 |
| 23 | 0.0269 | 0.0306 | 0.0226 |
| 24 | 0.0239 | 0.0276 | 0.0201 |
| 25 | 0.0209 | 0.0247 | 0.0179 |
| 26 | 0.0179 | 0.0217 | 0.0159 |
| 27 | 0.0164 | 0.0202 | 0.0142 |
| 28 | 0.0149 | 0.0187 | 0.0126 |
| 29 | 0.0135 | 0.0172 | 0.0113 |
| 30 | 0.012 | 0.0157 | 0.01 |
| 31 | 0.0105 | 0.0142 | 0.0089 |
| 32 | 0.0097 | 0.0134 | 0.008 |
| 33 | 0.009 | | 0.0071 |
| 34 | 0.0082 | | 0.0063 |
| 35 | 0.0075 | | 0.0056 |
| 36 | 0.0067 | | |