Tube Gauge Sizes Chart Table Data

This simple steel tubing size chart can be used to determine tube Inside Diameter (ID) using the tube Outside Diameter (OD) and Wall Thickness (WT). Tubing Wall Thickness is often described in terms of the BWG rating (Birmingham Wire Gauge) which is a way of describing the thickness. A 1” OD x 16 BWG tube has a wall thickness of 0.065” and a tube ID of 0.870”.

Tube ID Chart (Tube OD vs. Gauge [BWG])

Tube Outside Diameter (inches)

Tube Outside Diameter (OD)

Tube Gauge Thickness (BWG)

B.W.G	Wall Thickness	0.500	0.625	0.750	0.875	1.000	1.250	1.500	1.750	2.000
10	0.134	0.232	0.357	0.482	0.607	0.732	0.982	1.232	1.482	1.732
11	0.120	0.260	0.385	0.510	0.635	0.760	1.010	1.260	1.510	1.760
12	0.109	0.282	0.407	0.532	0.657	0.782	1.032	1.282	1.532	1.782
13	0.095	0.310	0.435	0.560	0.685	0.810	1.060	1.310	1.560	1.810
14	0.083	0.334	0.459	0.584	0.709	0.834	1.084	1.334	1.584	1.834
15	0.072	0.356	0.481	0.606	0.731	0.856	1.106	1.356	1.606	1.856
16	0.065	0.370	0.495	0.620	0.745	0.870	1.120	1.370	1.634	1.870
17	0.058	0.384	0.509	0.634	0.759	0.884	1.134	1.384	1.652	1.884
18	0.049	0.402	0.527	0.652	0.777	0.902	1.152	1.402	1.666	1.902
19	0.042	0.416	0.541	0.666	0.791	0.916	1.166	1.416	1.680	1.916
20	0.035	0.430	0.555	0.680	0.805	0.930	1.180	1.430	1.686	1.930
21	0.032	0.436	0.561	0.686	0.811	0.936	1.186	1.436	1.620	1.936
22	0.028	0.444	0.569	0.694	0.825	0.944	1.194	1.444	1.694	1.944
23	0.025	0.450	0.575	0.700	0.819	0.950	1.200	1.450	1.700	1.950
24	0.022	0.456	0.581	0.706	0.831	0.956	1.206	1.456	1.706	1.956

METRIC Tube ID Chart (Tube OD vs. Gauge [BWG])

Tube Outside Diameter (mm)

Tube Outside Diameter (OD)

Tube Gauge Thickness (BWG)

B.W.G	Wall Thickness	0.500	0.625	0.750	0.875	1.000	1.250	1.500	1.750	2.000
10	3.404	5.892	9.067	12.242	15.417	18.592	21.767	24.942	31.292	43.992
11	3.048	6.604	9.779	12.954	16.129	19.304	22.479	25.654	32.004	44.704
12	2.769	7.162	10.337	13.512	16.687	19.862	23.037	26.212	32.562	45.262
13	2.413	7.874	11.049	14.224	17.399	20.574	23.749	26.924	33.274	45.974
14	2.108	8.484	11.659	14.834	18.009	21.184	24.359	27.534	33.884	46.584
15	1.829	9.042	12.217	15.392	18.567	21.742	24.917	28.092	34.442	47.142
16	1.651	9.398	12.573	15.748	18.923	22.098	25.273	28.448	34.798	47.498
17	1.473	9.754	12.929	16.104	19.279	22.454	25.629	28.804	35.154	47.854
18	1.245	10.210	13.385	16.560	19.735	22.910	26.085	29.260	35.610	48.310
19	1.067	10.566	13.741	16.916	20.091	23.266	26.441	29.616	35.966	48.666
20	0.889	10.922	14.097	17.272	20.447	23.622	26.797	29.972	36.322	49.022
21	0.813	11.074	14.249	17.424	20.599	23.774	26.949	30.124	36.474	49.174
22	0.711	11.278	14.453	17.628	20.803	23.978	27.153	30.328	36.678	49.378
23	0.635	11.430	14.605	17.780	20.955	24.130	27.305	30.480	36.830	49.530
24	0.559	11.582	14.757	17.932	21.107	24.282	27.457	30.632	36.982	49.682

At Torq N' Seal, our team develops custom tube plugging solutions to meet your needs. We can manufacture tube plugs in a variety of alloys, lengths, diameters, and most importantly, your exact specifications. If you have any questions about our steel tubing size chart or how tubing size may affect your final product, feel free to contact us today.

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