Needle gauge comparison chart
Encyclopedia
- For knitting needleKnitting needleA knitting needle or knitting pin is a tool in hand-knitting to produce knitted fabrics. They generally have a long shaft and taper at their end, but they are not nearly as sharp as sewing needles. Their purpose is two-fold...
s see Knitting needle#Needle gauge
Hypodermic needle
Hypodermic needle
A hypodermic needle is a hollow needle commonly used with a syringe to inject substances into the body or extract fluids from it...
s are available in a wide variety of outer diameters described by gauge numbers. Smaller gauge numbers indicate larger outer diameters. Inner diameter depends on both gauge and wall thickness. The following chart shows nominal inner diameter and wall thickness for regular-wall needles. Thin-wall needles (not shown) have identical outer diameters but larger inner diameters for a given gauge.
Needle wire gauge is derived from the Birmingham Wire Gauge. #1 = 18½ B.W.G.; #2 = 19 B.W.G., and so on to #14 = 31 B.W.G.
| Needle | Nominal Outer Diameter | Nominal Inner Diameter | Nominal Wall Thickness | ||||||
| Gauge | inches | mm | tol. inches (mm) | inches | mm | tol. inches (mm) | inches | mm | tol. inches (mm) |
| 7 | 0.180 | 4.572 | ±0.001 (±0.025) | 0.150 | 3.810 | ±0.003 (±0.076) | 0.015 | 0.381 | ±0.001 (±0.025) |
| 8 | 0.165 | 4.191 | " | 0.135 | 3.429 | " | " | " | " |
| 9 | 0.148 | 3.759 | " | 0.118 | 2.997 | " | " | " | " |
| 10 | 0.134 | 3.404 | " | 0.106 | 2.692 | " | 0.014 | 0.356 | " |
| 11 | 0.120 | 3.048 | " | 0.094 | 2.388 | " | 0.013 | 0.330 | " |
| 12 | 0.109 | 2.769 | " | 0.085 | 2.159 | " | 0.012 | 0.305 | " |
| 13 | 0.095 | 2.413 | " | 0.071 | 1.803 | " | " | " | " |
| 14 | 0.083 | 2.108 | " | 0.063 | 1.600 | " | 0.01 | 0.254 | " |
| 15 | 0.072 | 1.829 | ±0.0005 (±0.013) | 0.054 | 1.372 | ±0.0015 (±0.038) | 0.009 | 0.229 | ±0.0005 (±0.013) |
| 16 | 0.065 | 1.651 | " | 0.047 | 1.194 | " | " | " | " |
| 17 | 0.058 | 1.473 | " | 0.042 | 1.067 | " | 0.008 | 0.203 | " |
| 18 | 0.050 | 1.270 | " | 0.033 | 0.838 | " | 0.0085 | 0.216 | " |
| 19 | 0.042 | 1.067 | " | 0.027 | 0.686 | " | 0.0075 | 0.191 | " |
| 20 | 0.03575 | 0.9081 | ±0.00025 (±0.0064) | 0.02375 | 0.603 | ±0.00075 (±0.019) | 0.006 | 0.1524 | ±0.00025 (±0.0064) |
| 21 | 0.03225 | 0.8192 | " | 0.02025 | 0.514 | " | " | " | " |
| 22 | 0.02825 | 0.7176 | " | 0.01625 | 0.413 | " | " | " | " |
| 22s | " | " | " | 0.006 | 0.152 | " | 0.0111 | 0.2826 | " |
| 23 | 0.02525 | 0.6414 | " | 0.01325 | 0.337 | " | 0.006 | 0.1524 | " |
| 24 | 0.02225 | 0.5652 | " | 0.01225 | 0.311 | " | 0.005 | 0.1270 | " |
| 25 | 0.02025 | 0.5144 | " | 0.01025 | 0.260 | " | " | " | " |
| 26 | 0.01825 | 0.4636 | " | " | " | " | 0.004 | 0.1016 | " |
| 26s | 0.01865 | 0.4737 | " | 0.005 | 0.127 | " | 0.0068 | 0.1734 | |
| 27 | 0.01625 | 0.4128 | " | 0.00825 | 0.210 | " | 0.004 | 0.1016 | " |
| 28 | 0.01425 | 0.3620 | " | 0.00725 | 0.184 | " | 0.0035 | 0.0889 | " |
| 29 | 0.01325 | 0.3366 | " | " | " | " | 0.003 | 0.0762 | " |
| 30 | 0.01225 | 0.3112 | " | 0.00625 | 0.159 | " | " | " | " |
| 31 | 0.01025 | 0.2604 | " | 0.00525 | 0.133 | " | 0.0025 | 0.0635 | " |
| 32 | 0.00925 | 0.2350 | " | 0.00425 | 0.108 | " | " | " | " |
| 33 | 0.00825 | 0.2096 | " | " | " | " | 0.002 | 0.0508 | " |
| 34 | 0.00725 | 0.1842 | " | 0.00325 | 0.0826 | " | " | " | " |