Metal Stamping & Steel Stamping Company

Formulas

Sheetmetal Gage Conversion Chart
Gage No. Steel Stainless Steel Aluminum
7 179 - -
8 .164 .172 -
9 .150 .156 -
10 .135 .141 -
11 .120 .125 -
12 .105 .109 -
13 .090 .094 .072
14 .075 .078 .064
15 .067 .070 .057
16 .060 .063 .051
17 .054 .056 .045
18 .048 .050 .040
19 .042 .044 .036
20 .036 .038 .032
21 .033 .034 .028
22 .030 .031 .025
23 .027 .028 .023
24 .024 .025 .020
25 .021 .022 .018
26 .018 .019 .017
27 .016 .017 .014
28 .015 .016 -
29 .014 .014 -
30 .012 .013 -
31 - .011 -

 

Metric/Inch Conversion Chart
Millimeters Fractions Inches Millimeters Fractions Inches
.397 1/64 .015625 13.097 33/64 .515625
.794 1/32 .03125 13.494 17/32 .53125
1.191 3/64 .046875 13.891 35/64 .546875
1.588 1/16 .0625 14.288 9/16 .5625
1.984 5/64 .078125 14.684 37/64 .573125
2.381 3/32 .09375 15.081 19/32 .59375
2.778 7/64 .109375 15.478 39/64 .609375
3.175 1/8 .125 15.875 5/8 .625
3.572 9/64 .140625 16.272 41/64 .640625
3.969 5/32 .15625 16.669 21/32 .65625
4.366 11/64 .171875 17.066 43/64 .671875
4.762 3/16 .1875 17.462 11/16 .6875
5.159 13/64 .203125 17.859 45/64 .703125
5.556 7/32 .21875 18.256 23/32 .71875
5.953 15/64 .234375 18.653 47/64 .734375
6.350 1/4 .25 19.050 3/4 .75
6.747 17/64 .265625 19.447 49/64 .765625
7.144 9/32 .28125 19.844 25/32 .78125
7.541 19/64 .296875 20.241 51/64 .796875
7.938 5/16 .3125 20.638 13/16 .8125
8.334 21/64 .328125 21.034 53/64 .828125
8.731 11/32 .34375 21.431 27/32 .84375
9.128 23/64 .359375 21.828 55/64 .859375
9.525 3/8 .375 22.225 7/8 .875
9.922 25/64 .390625 22.622 57/64 .890625