Needle Gauge Chart

 

Gauge Number	Needle Nominal O.D. (mm)	Needle Nominal I.D. (mm)	Needle Wall Thickness (mm)	Needle Dead Volume (µL/25.4 mm)
					34 gauge needle	0.159	0.051	0.051	0.052 µL/25.4 mm
33 gauge needle	0.21	0.108	0.051	0.233 µL/25.4 mm
32 gauge needle	0.235	0.108	0.064	0.233 µL/25.4 mm
31 gauge needle	0.261	0.133	0.064	0.353 µL/25.4 mm
30 gauge needle	0.312	0.159	0.076	0.504 µL/25.4 mm
29 gauge needle	0.337	0.184	0.076	0.675 µL/25.4mm
28 gauge needle	0.362	0.184	0.089	0.675 µL/25.4 mm
27 gauge needle	0.413	0.21	0.102	0.876 µL/25.4 mm
26s gauge needle	0.474	0.127	0.178	0.322 µL/25.4 mm
26 gauge needle	0.464	0.26	0.102	1.349 µL/25.4 mm
25s gauge needle	0.515	0.153	0.178	0.464 µL/25.4 mm
25 gauge needle	0.515	0.26	0.127	1.349 µL/25.4 mm
24 gauge needle	0.566	0.311	0.127	1.93 µL/25.4 mm
23s gauge needle	0.642	0.116	0.267	0.268 µL/25.4 mm
23 gauge needle	0.642	0.337	0.152	2.266 µL/25.4 mm
22s gauge needle	0.718	0.168	0.279	0.563 µL/25.4 mm
22 gauge needle	0.718	0.413	0.152	3.403 µL/25.4 mm
21 gauge needle	0.819	0.514	0.152	5.271 µL/25.4 mm
20 gauge needle	0.908	0.603	0.152	7.255 µL/25.4 mm
19 gauge needle	1.067	0.686	0.191	9.389 µL/25.4 mm
18 gauge needle	1.27	0.838	0.216	14.011 µL/25.4 mm
17 gauge needle	1.473	1.067	0.203	22.715 µL/25.4 mm
16 gauge needle	1.651	1.194	0.229	28.444 µL/25.4 mm
15 gauge needle	1.829	1.372	0.229	37.529 µL/25.4 mm
14 gauge needle	2.109	1.6	0.254	51.076 µL/25.4 mm
13 gauge needle	2.413	1.804	0.305	64.895 µL/25.4 mm
12 gauge needle	2.769	2.159	0.305	93 µL/25.4 mm
11 gauge needle	3.048	2.388	0.33	113.728 µL/25.4 mm
10 gauge needle	3.404	2.693	0.356	144.641 µL/25.4 mm
*mm are nominal

 

Gauge NoInchMetric

0	0.324"	8.2mm
1	0.300"	7.6mm
2	0.276"	7.0mm
3	0.252"	6.4mm
4	0.232"	5.9mm
5	0.212"	5.4mm
6	0.192"	4.9mm
7	0.176"	4.5mm
8	0.160"	4.1mm
9	0.144"	3.7mm
10	0.128"	3.2mm
11	0.116"	2.9mm
12	0.104"	2.6mm
13	0.092"	2.3mm
14	0.080"	2.0mm
15	0.072"	1.8mm
16	0.064"	1.6mm
17	0.056"	1.4mm
18	0.048"	1.2mm
19	0.040"	1.0mm
20	0.036"	0.9mm
21	0.032"	0.8mm
22	0.028"	0.7mm
23	0.024"	0.6mm
25	0.020"	0.5mm
26	0.018"	0.45mm
27	0.0164"	0.42mm
28	0.0148"	0.37mm
29	0.0136"	0.34mm
30	0.0124"	0.31mm
31	0.0116"	0.29mm
32	0.0108"	0.27mm
33	0.0100"	0.25mm
34	0.0092"	0.23mm
35	0.0084"	0.21mm
36	0.0076"	0.19mm
37	0.0068"	0.17mm
38	0.0060"	0.15mm
39	0.0052"	0.13mm
40	0.0048"	0.12mm