Conversion of gauge and mm units

       Conversion of gauge and mm units

—— Unit conversion

Since the Ga. system is different from inches, there is no conversion formula. The unit comparison is as follows

Gauge (Ga.) Standard steel thickness (inch) Thickness of galvanized steel (inch) Aluminum thickness (inch) Standard steel thickness (mm) Thickness of galvanized steel（mm） Aluminum thickness（mm）

3 0.2391 0.2294 6.07314 5.82676

4 0.2242 0.2043 5.69468 5.18922

5 0.2092 0.1819 5.31368 4.62026

6 0.1943 0.162 4.93522 4.1148

7 0.1793 0.1443 4.55422 3.66522

8 0.1644 0.1285 4.17576 3.2639

9 0.1495 0.1532 0.1144 3.7973 3.89128 2.90576

10 0.1345 0.1382 0.1019 3.4163 3.51028 2.58826

11 0.1196 0.1233 0.0907 3.03784 3.13182 2.30378

12 0.1046 0.1084 0.0808 2.65684 2.75336 2.05232

13 0.0897 0.0934 0.072 2.27838 2.37236 1.8288

14 0.0747 0.0785 0.0641 1.89738 1.9939 1.62814

15 0.0673 0.071 0.0571 1.70942 1.8034 1.45034

16 0.0598 0.0635 0.0508 1.51892 1.6129 1.29032

17 0.0538 0.0575 0.0453 1.36652 1.4605 1.15062

18 0.0478 0.0516 0.0403 1.21412 1.31064 1.02362

19 0.0418 0.0456 0.0359 1.06172 1.15824 0.91186

20 0.0359 0.0396 0.032 0.91186 1.00584 0.8128

21 0.0329 0.0366 0.0285 0.83566 0.92964 0.7239

22 0.0299 0.0336 0.0253 0.75946 0.85344 0.64262

23 0.0269 0.0306 0.0226 0.68326 0.77724 0.57404

24 0.0239 0.0276 0.0201 0.60706 0.7004 0.51054

25 0.0209 0.0247 0.0179 0.53086 0.62738 0.45466

26 0.0179 0.0217 0.0159 0.45466 0.55118 0.40386

27 0.0164 0.0202 0.0142 0.41656 0.51308 0.36068

28 0.0149 0.0187 0.0126 0.37846 0.47498 0.32004

29 0.035 0.0172 0.0113 0.3429 0.43688 0.28702

30 0.012 0.0157 0.01 0.3048 0.39878 0.254

31 0.0105 0.0142 0.0089 0.2667 0.36068 0.22606

32 0.0097 0.0134 0.008 0.24638 0.34036 0.2032

33 0.009 0.0071 0.2286 0.18034

34 0.0082 0.0063 0.20828 0.16002

35 0.0075 0.0056 0.1905 0.14224

36 0.0067 0.17018