Gauge to Inches to Millimeters Conversion Table

Brown and Sharpe Gauge is simply a standard measure of thickness. Below are charts to use as measurement reference guides. These charts provide the necessary information to convert between inches, millimeters, feet/troy ounces, and gauges. For more information on gauge click here and for more information on hardness click here.

NOTE:

The feet/Toz conversion below is approximate.

Brown and Sharpe Gauge Chart
Gauge	Inches (" or In)	Millimeters (mm)
0	0.325	8.26
2	0.257	6.54
4	0.204	5.19
6	0.162	4.12
8	0.128	3.26
10	0.102	2.59
12	0.081	2.05
14	0.064	1.63
16	0.051	1.29
18	0.04	1.02
19	0.036	0.912
20	0.032	0.812
21	0.028	0.723
22	0.025	0.644
23	0.023	0.573
24	0.02	0.511
25	0.018	0.455
26	0.016	0.405
27	0.014	0.36
28	0.013	0.321
29	0.011	0.286
30	0.01	0.255
32	0.008	0.2019
34	0.0063	0.16

Wire Conversion
Gauge	Feet per Troy Ounce (ft/Toz)
14	4.65
16	7.5
18	12
20	19
22	31
24	48
26	77
28	125
30	200