Metal sheet thickness is measured in gauge. The table below provides conversion to inches. Wire/conductor sizes are also measured in gauge and are equivalent to the non-ferrous thicknesses listed below, but we have an article specific to wire gauge.
| GAUGE | NON-FERROUS METAL ALUM, BRASS, ETC. INCHES | GALVANIZED STEEL INCHES | STANDARD STEEL INCHES | STAINLESS STEEL INCHES |
|---|---|---|---|---|
| 1 | .2893 | .2812 | ||
| 2 | .2576 | .2656 | ||
| 3 | .2294 | .2391 | .2500 | |
| 4 | .2043 | .2242 | .2344 | |
| 5 | .1819 | .2092 | .2187 | |
| 6 | .1620 | .1943 | .2031 | |
| 7 | .1443 | .1793 | .1875 | |
| 8 | .1285 | .1680 | .1644 | .1719 |
| 9 | .1144 | .1532 | .1495 | .1562 |
| 10 | .1019 | .1382 | .1345 | .1406 |
| 11 | .0907 | .1233 | .1196 | .1250 |
| 12 | .0808 | .1084 | .1046 | .1094 |
| 13 | .0720 | .0934 | .0897 | .0937 |
| 14 | .0641 | .0785 | .0747 | .0781 |
| 15 | .0571 | .0710 | .0673 | .0703 |
| 16 | .0508 | .0635 | .0598 | .0625 |
| 17 | .0453 | .0575 | .0538 | .0562 |
| 18 | .0403 | .0516 | .0478 | .0500 |
| 19 | .0359 | .0456 | .0418 | .0437 |
| 20 | .0320 | .0396 | .0359 | .0375 |
| 21 | .0285 | .0366 | .0329 | .0344 |
| 22 | .0253 | .0336 | .0299 | .0312 |
| 23 | .0226 | .0306 | .0269 | .0281 |
| 24 | .0201 | .0276 | .0239 | .0250 |
| 25 | .0179 | .0247 | .0209 | .0219 |
| 26 | .0159 | .0217 | .0179 | .0187 |
| 27 | .0142 | .0202 | .0164 | .0172 |
| 28 | .0126 | .0187 | .0149 | .0156 |
| 29 | .0113 | .0172 | .0135 | .0141 |
| 30 | .0100 | .0157 | .0120 | .0125 |
