--- type: "gauge-material" material: "steel" name: "Sheet Steel" gauge_system: "MSG" gauge_count: 34 thickest_gauge: "3" thinnest_gauge: "36" range_in: "0.0067–0.2391" standard: "15 U.S.C. 206; Manufacturers' Standard Gauge; Brown & Sharpe / AWG" verified: "August 1, 2026" url: https://shopmath.org/gauges/steel --- # Sheet Steel Gauge Chart — All 34 Gauges in Inches and Millimetres Sheet Steel is gauged on the MSG, running from 3 ga at 0.2391 in (6.074 mm) down to 36 ga at 0.0067 in (0.171 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**: Sheet Steel - **Gauge system**: MSG - **Gauges**: 34 - **Thickest**: 3 ga — 0.2391 in - **Thinnest**: 36 ga — 0.0067 in - **Standard**: 15 U.S.C. 206; Manufacturers' Standard Gauge; Brown & Sharpe / AWG ## Every Sheet Steel Gauge | Gauge | Thickness (in) | Thickness (mm) | Weight (lb/ft²) | Weight (kg/m²) | | --- | --- | --- | --- | --- | | [3 ga](https://shopmath.org/gauges/steel/3.md) | 0.2391 | 6.074 | 10.000 | 48.82 | | [4 ga](https://shopmath.org/gauges/steel/4.md) | 0.2242 | 5.694 | 9.375 | 45.77 | | [5 ga](https://shopmath.org/gauges/steel/5.md) | 0.2092 | 5.314 | 8.750 | 42.72 | | [6 ga](https://shopmath.org/gauges/steel/6.md) | 0.1943 | 4.935 | 8.125 | 39.67 | | [7 ga](https://shopmath.org/gauges/steel/7.md) | 0.1793 | 4.555 | 7.500 | 36.62 | | [8 ga](https://shopmath.org/gauges/steel/8.md) | 0.1644 | 4.176 | 6.875 | 33.57 | | [9 ga](https://shopmath.org/gauges/steel/9.md) | 0.1495 | 3.796 | 6.250 | 30.52 | | [10 ga](https://shopmath.org/gauges/steel/10.md) | 0.1345 | 3.416 | 5.625 | 27.46 | | [11 ga](https://shopmath.org/gauges/steel/11.md) | 0.1196 | 3.037 | 5.000 | 24.41 | | [12 ga](https://shopmath.org/gauges/steel/12.md) | 0.1046 | 2.657 | 4.375 | 21.36 | | [13 ga](https://shopmath.org/gauges/steel/13.md) | 0.0897 | 2.278 | 3.750 | 18.31 | | [14 ga](https://shopmath.org/gauges/steel/14.md) | 0.0747 | 1.898 | 3.125 | 15.26 | | [15 ga](https://shopmath.org/gauges/steel/15.md) | 0.0673 | 1.708 | 2.813 | 13.73 | | [16 ga](https://shopmath.org/gauges/steel/16.md) | 0.0598 | 1.518 | 2.500 | 12.21 | | [17 ga](https://shopmath.org/gauges/steel/17.md) | 0.0538 | 1.367 | 2.250 | 10.99 | | [18 ga](https://shopmath.org/gauges/steel/18.md) | 0.0478 | 1.215 | 2.000 | 9.77 | | [19 ga](https://shopmath.org/gauges/steel/19.md) | 0.0418 | 1.063 | 1.750 | 8.54 | | [20 ga](https://shopmath.org/gauges/steel/20.md) | 0.0359 | 0.911 | 1.500 | 7.32 | | [21 ga](https://shopmath.org/gauges/steel/21.md) | 0.0329 | 0.835 | 1.375 | 6.71 | | [22 ga](https://shopmath.org/gauges/steel/22.md) | 0.0299 | 0.759 | 1.250 | 6.10 | | [23 ga](https://shopmath.org/gauges/steel/23.md) | 0.0269 | 0.683 | 1.125 | 5.49 | | [24 ga](https://shopmath.org/gauges/steel/24.md) | 0.0239 | 0.607 | 1.000 | 4.88 | | [25 ga](https://shopmath.org/gauges/steel/25.md) | 0.0209 | 0.531 | 0.875 | 4.27 | | [26 ga](https://shopmath.org/gauges/steel/26.md) | 0.0179 | 0.456 | 0.750 | 3.66 | | [27 ga](https://shopmath.org/gauges/steel/27.md) | 0.0164 | 0.418 | 0.688 | 3.36 | | [28 ga](https://shopmath.org/gauges/steel/28.md) | 0.0149 | 0.380 | 0.625 | 3.05 | | [29 ga](https://shopmath.org/gauges/steel/29.md) | 0.0135 | 0.342 | 0.563 | 2.75 | | [30 ga](https://shopmath.org/gauges/steel/30.md) | 0.0120 | 0.304 | 0.500 | 2.44 | | [31 ga](https://shopmath.org/gauges/steel/31.md) | 0.0105 | 0.266 | 0.438 | 2.14 | | [32 ga](https://shopmath.org/gauges/steel/32.md) | 0.0097 | 0.247 | 0.406 | 1.98 | | [33 ga](https://shopmath.org/gauges/steel/33.md) | 0.0090 | 0.228 | 0.375 | 1.83 | | [34 ga](https://shopmath.org/gauges/steel/34.md) | 0.0082 | 0.209 | 0.344 | 1.68 | | [35 ga](https://shopmath.org/gauges/steel/35.md) | 0.0075 | 0.190 | 0.313 | 1.53 | | [36 ga](https://shopmath.org/gauges/steel/36.md) | 0.0067 | 0.171 | 0.281 | 1.37 | _Sheet is supplied to a mill tolerance around these nominal thicknesses; measure the stock when the fit matters._ ## Sources and Method for the Sheet Steel Gauge Chart ### Sheet 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/steel) — data verified August 1, 2026. Reference data; verify against the governing standard before manufacture.*