Piercing gauge to mm: body jewelry sizes
Body jewelry thickness is given in gauge while shops often sell a rounded metric size; this tool shows both.
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How to use it
- Enter gauge.
- The result appears straight away and updates as you edit.
- Copy the result, or copy a link that keeps the same values to share it.
How it is calculated
Exact diameter from the AWG formula: 0.127 × 92^((36 − n) / 39) mm. The metric size is the closest of the common sizes 0.6, 0.8, 1, 1.2, 1.6, 2, 2.5, 3, 3.2, 4, 5, 6, 8 and 10 mm.
Example
Inputs: Gauge = 16g. Result: Common metric size: 1.2 mm; Exact diameter (AWG): 1.291 mm; Diameter in inches: 0.0508 in.
Limits and caveats
- Shops round differently, so 2g may be sold as 6 or 6.5 mm and 00g as 9.5 or 10 mm.
- Gauge measures post thickness only, not ring diameter or bar length.
Questions about this tool
What is 16g in mm?
It is usually sold as 1.2 mm; the exact diameter is 1.29 mm.
What is 14g in mm?
Commonly 1.6 mm, with an exact diameter of 1.63 mm.
Is a higher gauge thicker?
No, a higher gauge is thinner, so 20g is finer than 14g, and 0 and 00 are the thickest.