Gauge to inches
Type a value in G to get it in in instantly.
0.02827in
That's 1.39× as thick as a 25 G vaccination needle, while a 21 G blood-test needle is 1.14× thicker. That is about 10.26 times the thickness of a human hair.
Convert the other way: in to G
What it means
How thick is that needle?
Nominal outer diameters from the ISO 9626 table. Thin-wall and regular-wall needles of the same gauge share the outside diameter but differ inside.
The math
How to convert G to in
Gauge is a table, not a formula: 21 G = 0.819 mm, 23 G = 0.642 mm, and values between gauges are interpolated.
Example: 22 G = 0.0282677 in.
Every unit
That needle in every unit
Tables
G to in conversion table
| G | in |
|---|---|
| 14 G | 0.0829921 in |
| 16 G | 0.065 in |
| 18 G | 0.05 in |
| 19 G | 0.0420079 in |
| 20 G | 0.035748 in |
| 21 G | 0.0322441 in |
| 22 G | 0.0282677 in |
| 23 G | 0.0252756 in |
| 24 G | 0.0222835 in |
| 25 G | 0.0202756 in |
| 26 G | 0.0182677 in |
| 27 G | 0.0162598 in |
| 28 G | 0.014252 in |
| 29 G | 0.0132677 in |
| 30 G | 0.0122835 in |
| 31 G | 0.0102756 in |
| 32 G | 0.00925197 in |
in to G conversion table
| in | G |
|---|---|
| 0.00925 in | 32.002 G |
| 0.0103 in | 30.9878 G |
| 0.0123 in | 29.9832 G |
| 0.0133 in | 28.9672 G |
| 0.0143 in | 27.9761 G |
| 0.0163 in | 26.98 G |
| 0.0183 in | 25.9839 G |
| 0.0203 in | 24.9878 G |
| 0.0223 in | 23.9945 G |
| 0.0253 in | 22.9918 G |
| 0.0283 in | 21.9919 G |
| 0.0322 in | 21.0111 G |
| 0.0357 in | 20.0137 G |
| 0.042 in | 19.0013 G |
| 0.05 in | 18 G |
| 0.065 in | 16 G |
| 0.083 in | 13.9993 G |
Quick answers
Quick answers
- How many in is 10 G?
- 10 G is 0.134016 in.
- How many in is 22 G?
- 22 G is 0.0282677 in.
The units
About these units
Gauge (G)
The Birmingham/Stubs number printed on the hub.
Inches (in)
Outer diameter in inches.
Keep going