Gauge to Inches and Millimeters Conversion  | |||||
 Gauge ( ga )  | 
 Mils  | 
  Inches ( in ) 
 Aluminum 
 Sheet Metal 
 | 
  Millimeters ( mm ) 
 Aluminum 
 Sheet Metal 
 | 
||
 12  | 
 97  | 
 0.0809  | 
 0.1046  | 
 2.053  | 
 2.656  | 
 14  | 
 68  | 
 0.0641  | 
 0.0747  | 
 1.628  | 
 1.897  | 
 16  | 
 54  | 
 0.0508  | 
 0.0598  | 
 1.290  | 
 1.519  | 
 18  | 
 43  | 
 0.0403  | 
 0.0478  | 
 1.024  | 
 1.214  | 
 20  | 
 33  | 
 0.0320  | 
 0.0359  | 
 0.813  | 
 0.912  | 
 22  | 
 27  | 
 0.0253  | 
 0.0299  | 
 0.643  | 
 0.759  | 
 25  | 
 18  | 
 0.0179  | 
 0.0209  | 
 0.455  | 
 0.531  | 
 Inches to Millimeters Conversion  | |
 Inches ( in )  | 
 Milimeters ( mm )  | 
 1 / 32 "  | 
 0.79 mm  | 
 1 / 16 "  | 
 1.57 mm  | 
 1 / 8 "  | 
 3.18 mm  | 
 3 / 16 "  | 
 4.78 mm  | 
 1 / 4 "  | 
 6.35 mm  | 
 5 / 16 "  | 
 7.95 mm  | 
 3 / 8 "  | 
 9.53 mm  | 
 7 / 16 "  | 
 11.13 mm  | 
 1 / 2 "  | 
 12.70 mm  | 
 9 / 16 "  | 
 14.30 mm  | 
 5 / 8 "  | 
 15.88 mm  | 
 11 / 16 "  | 
 17.48 mm  | 
 3 / 4 "  | 
 19.05 mm  | 
 13 / 16 "  | 
 20.65 mm  | 
 7 / 8 "  | 
 22.23 mm  | 
 15 / 16 "  | 
 23.83 mm  | 
 1 "  | 
 25.4 mm  | 
 1-1 / 8 "  | 
 28.58 mm  | 
 1-1 / 4 "  | 
 31.75 mm  | 
 1-5 / 8 "  | 
 41.28 mm  | 
 2 "  | 
 50.8 mm  | 
 3 "  | 
 76.2 mm  |