---
type: "gauge-material"
material: "galvanized"
name: "Galvanized Steel"
gauge_system: "galvanized-MSG"
gauge_count: 24
thickest_gauge: "9"
thinnest_gauge: "32"
range_in: "0.0135–0.1532"
standard: "15 U.S.C. 206; Manufacturers' Standard Gauge; Brown & Sharpe / AWG"
verified: "August 1, 2026"
url: https://shopmath.org/gauges/galvanized
---

# Galvanized Steel Gauge Chart — All 24 Gauges in Inches and Millimetres

Galvanized Steel is gauged on the galvanized-MSG, running from 9 ga at 0.1532 in (3.891 mm) down to 32 ga at 0.0135 in (0.342 mm). A higher gauge number is thinner metal, and the same number means a different thickness in another material — the system is what makes the number mean anything.

- **Material**: Galvanized Steel
- **Gauge system**: galvanized-MSG
- **Gauges**: 24
- **Thickest**: 9 ga — 0.1532 in
- **Thinnest**: 32 ga — 0.0135 in
- **Standard**: 15 U.S.C. 206; Manufacturers' Standard Gauge; Brown & Sharpe / AWG

## Every Galvanized Steel Gauge

| Gauge | Thickness (in) | Thickness (mm) | Weight (lb/ft²) | Weight (kg/m²) |
| --- | --- | --- | --- | --- |
| [9 ga](https://shopmath.org/gauges/galvanized/9.md) | 0.1532 | 3.891 | 6.250 | 30.52 |
| [10 ga](https://shopmath.org/gauges/galvanized/10.md) | 0.1382 | 3.511 | 5.625 | 27.46 |
| [11 ga](https://shopmath.org/gauges/galvanized/11.md) | 0.1233 | 3.132 | 5.000 | 24.41 |
| [12 ga](https://shopmath.org/gauges/galvanized/12.md) | 0.1084 | 2.752 | 4.375 | 21.36 |
| [13 ga](https://shopmath.org/gauges/galvanized/13.md) | 0.0934 | 2.373 | 3.750 | 18.31 |
| [14 ga](https://shopmath.org/gauges/galvanized/14.md) | 0.0785 | 1.993 | 3.125 | 15.26 |
| [15 ga](https://shopmath.org/gauges/galvanized/15.md) | 0.0710 | 1.803 | 2.813 | 13.73 |
| [16 ga](https://shopmath.org/gauges/galvanized/16.md) | 0.0635 | 1.613 | 2.500 | 12.21 |
| [17 ga](https://shopmath.org/gauges/galvanized/17.md) | 0.0575 | 1.462 | 2.250 | 10.99 |
| [18 ga](https://shopmath.org/gauges/galvanized/18.md) | 0.0516 | 1.310 | 2.000 | 9.77 |
| [19 ga](https://shopmath.org/gauges/galvanized/19.md) | 0.0456 | 1.158 | 1.750 | 8.54 |
| [20 ga](https://shopmath.org/gauges/galvanized/20.md) | 0.0396 | 1.006 | 1.500 | 7.32 |
| [21 ga](https://shopmath.org/gauges/galvanized/21.md) | 0.0366 | 0.930 | 1.375 | 6.71 |
| [22 ga](https://shopmath.org/gauges/galvanized/22.md) | 0.0336 | 0.854 | 1.250 | 6.10 |
| [23 ga](https://shopmath.org/gauges/galvanized/23.md) | 0.0306 | 0.778 | 1.125 | 5.49 |
| [24 ga](https://shopmath.org/gauges/galvanized/24.md) | 0.0276 | 0.702 | 1.000 | 4.88 |
| [25 ga](https://shopmath.org/gauges/galvanized/25.md) | 0.0247 | 0.626 | 0.875 | 4.27 |
| [26 ga](https://shopmath.org/gauges/galvanized/26.md) | 0.0217 | 0.550 | 0.750 | 3.66 |
| [27 ga](https://shopmath.org/gauges/galvanized/27.md) | 0.0202 | 0.512 | 0.688 | 3.36 |
| [28 ga](https://shopmath.org/gauges/galvanized/28.md) | 0.0187 | 0.474 | 0.625 | 3.05 |
| [29 ga](https://shopmath.org/gauges/galvanized/29.md) | 0.0172 | 0.436 | 0.563 | 2.75 |
| [30 ga](https://shopmath.org/gauges/galvanized/30.md) | 0.0157 | 0.399 | 0.500 | 2.44 |
| [31 ga](https://shopmath.org/gauges/galvanized/31.md) | 0.0142 | 0.361 | 0.438 | 2.14 |
| [32 ga](https://shopmath.org/gauges/galvanized/32.md) | 0.0135 | 0.342 | 0.406 | 1.98 |

_Sheet is supplied to a mill tolerance around these nominal thicknesses; measure the stock when the fit matters._

## Sources and Method for the Galvanized Steel Gauge Chart

### Galvanized Steel gauge thicknesses

- **Source**: 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
- **Method**: computed
- **Verified against**: Wikipedia Sheet metal, Standard sheet metal gauges table (CC BY-SA 4.0) — 137/137 checks passed at 0.05 mil

### Assumptions

- Gauge is a numbering scheme, not a unit. A thickness is only meaningful with its material and gauge system stated.
- 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

## Related pages

- All materials: [Sheet metal gauge reference](https://shopmath.org/gauges.md)
- Every material side by side: [Sheet metal gauge chart](https://shopmath.org/charts/sheet-metal-gauge.md)

---

*Source: [ShopMath](https://shopmath.org/gauges/galvanized) — data verified August 1, 2026. Reference data; verify against the governing standard before manufacture.*