Sheet metal · Aluminium · Brown & Sharpe (AWG)
Sheet Aluminium Gauge Chart — Thickness in Inches and Millimetres
https://shopmath.org/gauges/aluminum · data verified August 1, 2026
Sheet Aluminium runs from 3 gauge at 0.2294 in (5.827 mm) down to 35 gauge at 0.0056 in (0.143 mm), 33 sizes in all. Aluminium and other non-ferrous sheet on the Brown & Sharpe geometric series.
- Gauges
- 33
- Thickest
- 3 ga
- Thinnest
- 35 ga
- System
- Brown & Sharpe (AWG)
Every Aluminium Sheet Gauge and Its Thickness
33 gauges on the Brown & Sharpe (AWG), thickest first. A lower gauge number is thicker sheet, and the steps are geometric rather than even.
| Property | Thickness | Weight | ||
|---|---|---|---|---|
| Gauge | in | mm | lb/ft² | kg/m² |
| 3 ga | 0.2294 | 5.827 | — | — |
| 4 ga | 0.2043 | 5.189 | — | — |
| 5 ga | 0.1819 | 4.621 | — | — |
| 6 ga | 0.1620 | 4.115 | — | — |
| 7 ga | 0.1443 | 3.665 | — | — |
| 8 ga | 0.1285 | 3.264 | — | — |
| 9 ga | 0.1144 | 2.906 | — | — |
| 10 ga | 0.1019 | 2.588 | — | — |
| 11 ga | 0.0907 | 2.305 | — | — |
| 12 ga | 0.0808 | 2.053 | — | — |
| 13 ga | 0.0720 | 1.828 | — | — |
| 14 ga | 0.0641 | 1.628 | — | — |
| 15 ga | 0.0571 | 1.450 | — | — |
| 16 ga | 0.0508 | 1.291 | — | — |
| 17 ga | 0.0453 | 1.149 | — | — |
| 18 ga | 0.0403 | 1.024 | — | — |
| 19 ga | 0.0359 | 0.912 | — | — |
| 20 ga | 0.0320 | 0.812 | — | — |
| 21 ga | 0.0285 | 0.723 | — | — |
| 22 ga | 0.0253 | 0.644 | — | — |
| 23 ga | 0.0226 | 0.573 | — | — |
| 24 ga | 0.0201 | 0.511 | — | — |
| 25 ga | 0.0179 | 0.455 | — | — |
| 26 ga | 0.0159 | 0.405 | — | — |
| 27 ga | 0.0142 | 0.361 | — | — |
| 28 ga | 0.0126 | 0.321 | — | — |
| 29 ga | 0.0113 | 0.286 | — | — |
| 30 ga | 0.0100 | 0.255 | — | — |
| 31 ga | 0.0089 | 0.227 | — | — |
| 32 ga | 0.0080 | 0.202 | — | — |
| 33 ga | 0.0071 | 0.180 | — | — |
| 34 ga | 0.0063 | 0.160 | — | — |
| 35 ga | 0.0056 | 0.143 | — | — |
Thicknesses are nominal, before mill tolerance. Weight per unit area is not part of this gauge system's definition, so the weight columns are empty here by design.
Sources and Method for the Aluminium Gauge Chart
- Sheet Aluminium thicknessescomputed
15 U.S.C. 206 (Act of Mar. 3, 1893, ch. 221, 27 Stat. 746) — U.S. Standard Gauge for sheet and plate iron and steel; 15 U.S.C. 206 statutory weights; MSG (41.82 lb/ft2 per inch), galvanized zinc allowance, and Brown & Sharpe formula per docs/research/data-sourcing.md §3.7
Verified against Wikipedia Sheet metal, Standard sheet metal gauges table (CC BY-SA 4.0) — 137/137 checks passed at 0.05 mil
Computed from the standard's formulas, then checked against published tables.
- Assumptions
- Thicknesses are nominal; mill tolerance is not part of the gauge definition.
- Gauge numbers here index the Brown & Sharpe (AWG). The same number on another material is a different thickness.
- Dataset scope: EXCLUDED: stainless steel (genuinely ambiguous convention, only one source in hand), zinc, copper, brass, steel tube wall.
- Data last verified
- August 1, 2026
How to Cite This Aluminium Gauge Chart
Citation
ShopMath. "Sheet Aluminium Gauge Chart — Thickness in Inches and Millimetres." ShopMath, verified August 1, 2026, https://shopmath.org/gauges/aluminum
BibTeX
@misc{shopmath-gauges-aluminum,
title = {Sheet Aluminium Gauge Chart — Thickness in Inches and Millimetres},
author = {{ShopMath}},
year = {2026},
howpublished = {\url{https://shopmath.org/gauges/aluminum}},
note = {Data verified 2026-08-01}
}Permanent URL
https://shopmath.org/gauges/aluminum