Metric Conversion Table

Inch-Metric Table

Inches
Frac                        Dec

mm
Inches
Frac                        Dec
mm
1/64 0.015 625 0.3969 33/64 0.515 625 13.3969
1/32 0.031 250 0.7938 17/32 0.531 250 13.4938
3/64 0.046 875 1.1906 35/64 0.546 875 13.8906
1/16 0.062 500 1.5875 9/16 0.562 500 14.2875
5/64 0.078 125 1.9844 37/64 0.578 125 14.6844
3/32 0.093 750 2.3812 19/32 0.593 750 15.0812
7/64 0.109 375 2.7781 39/64 0.609 375 15.4781
1/8 0.125 000 3.1750 5/8 0.625 000 15.8750
9/64 0.140 625 3.5719 41/64 0.640 625 16.2719
5/32 0.156 250 3.9688 21/32 0.656 250 16.6688
11/64 0.171 875 4.3656 43/64 0.671 875 17.0656
3/16 0.187 500 4.7625 11/16 0.687 500 17.4625
13/64 0.203 125 5.1594 45/64 0.703 125 17.8594
7/32 0.218 750 5.5562 23/32 0.718 750 18.2562
15/64 0.234 375 5.9531 47/64 0.734 375 18.6531
1/4 0.250 000 6.3500 3/4 0.750 000 19.0500
17/64 0.265 625 6.7469 49/64 0.765 625 19.4469
9/32 0.281 250 7.1438 25/32 0.781 250 19.8437
16/64 0.296 875 7.5406 51/64 0.796 875 20.2406
5/16 0.312 500 7.9375 13/16 0.812 500 20.6375
21/64 0.328 125 8.3344 53/64 0.828 125 21.0344
11/32 0.343 750 8.7312 27/32 0.843 750 21.4312
23/64 0.395 375 9.1281 55/64 0.859 375 21.8281
3/8 0.375 000 9.5250 7/8 0.875 000 22.2250
25/64 0.390 625 9.9219 57/64 0.890 625 22.6219
13/32 0.406 250 10.3188 29/32 0.906 250 23.0188
27/64 0.421 875 10.7156 59/64 0.921 875 23.4156
7/16 0.437 500 11.1125 15/16 0.937 500 23.8125
29/64 0.453 125 11.5094 61/64 0.953 125 24.2094
15/32 0.468 750 11.9062 31/32 0.968 750 24.6062
31/64 0.484 375 12.3031 63/64 0.984 375 25.0031
1/2 0.500 000 12.7000 1 1.000 000 25.4000



Decimal Equivalent of Standard Sheet Gauges

No. of Gauge Thickness in Thousandths
Aluminum              Steel 
(B&S)         (U.S. Std.)
10 .1019 .1345
11 .0907 .1196
12 .0808 .1046
13 .0720 .0897
14 .0641 .0747
15 .0571 .0673
16 .0508 .0598
17 .0453 .0538
18 .0403 .0478
19 .0359 .0418
20 .0320 .0359
21 .0285 .0329
22 .0253 .0299
23 .0226 .0269
24 .0201 .0239
25 .0179 .0209
26 .0159 .0179
27 .0142 .0164
28 .0126 .0149
29 .0113 .0135
30 .0100 .0120