# Wire gauge formula

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For what it's worth.
This is a handy formula to calculate wire gauge given the gauge number.

0.3248*exp(-0.1159*gauge)=wire diameter(inch)

This formula works for any gauge from (0 to 40) or larger although it was
only checked with the following table. Note for 00 gauge enter -1, for 000
enter -2 and 0000 -3.

Brown & Sharpe Wire Gauge (from CRC 53rd edition)
Gauge	Dia
0000	0.46
000	0.4096
00	0.3648
0	0.3249
1	0.2893
2	0.2576
3	0.2294
4	0.2043
5	0.1819
6	0.162
7	0.1443
8	0.1285
9	0.1144
10	0.1019
11	0.09074
12	0.08081
13	0.07196
14	0.06408
15	0.05707
16	0.05082
17	0.04526
18	0.0403
19	0.03589
20	0.03196
21	0.02846
22	0.02535
23	0.02257
24	0.0201
25	0.0179
26	0.01594
27	0.01419
28	0.01264
29	0.01126
30	0.01003
31	0.008928
32	0.00795
33	0.00708
34	0.006304
35	0.005614
36	0.005
37	0.004453
38	0.003965
39	0.003531
40	0.003145
```