There are several different gauge systems used today with specific gauge designations used for specific metal types.
Stainless steel sheet metal gauge to mm.
Gauge stainless galvanized sheet steel aluminum fraction inches mm inches mm inches mm inches mm 30 0 0125 0 33 0 0157 0 40 0 0120 0 30 0 0100 0 25 29 0 0141 0 36 0 0172 0 44 0 0135 0 34 0 0113 0 29 28 1 64 0 0156 0 41 0 0187 0 47 0 0149 0 38 0 0126 0 32 27 0 0172 0 43 0 0202 0 51 0 0164 0 42 0 0142 0 36 26 0 0187 0 48 0 0217 0 55 0 0179 0 45 0 0159 40 25 0 0219 0 56 0 0247 0 63 0 0209 0 53 0 0179 0 46 24 0 025 0 64 0 0276 0 70.
The gauge number 18 holds no relevance to the actual measurements.
These dimensions vary slightly between different materials such as stainless steel and aluminium but should be accurate enough for most everyday purposes.
0 0394 inch 20 gauge.
Standard steel mm non ferrous aluminum mm galvanized steel mm 000000.
8 gauge 4 176 mm stainless steel.
0 0590 inch 16 gauge.
For example 18 gauge steel according to a gauge conversion chart is 0 0478 inch or 1 214 millimeter.
0 0787 inch 14 gauge.
0 1181 inch 12 gauge.
8 gauge 4 191 mm aluminum brass copper.
For different materials of steel the same gauge will also correspond to different mm.
8 gauge 4 115 mm.
0 0472 inch 18 gauge.
0 0187 0 452 0 0217 0 55 0 0179 0 45 0 0159 40 25.
Inches mm inches mm 26.
Gauge to inch gauge to mm list for stainless steel sheet.