--- title: "Sheet Metal Gauge Calculator" description: "Convert gauge to mm/inch and get sheet weight — steel, stainless, aluminum, galvanized. Free." image: "https://nestingcalc.com/og-default.png" url: "https://nestingcalc.com/sheet-metal-gauge/" locale: "en" --- # Sheet Metal Gauge Calculator Convert gauge to mm/inch and get sheet weight — steel, stainless, aluminum, galvanized. Free. Pick a material and gauge number to see the exact thickness in mm and inches, or enter a measured thickness to find the nearest gauge. Add sheet size to get the weight per sheet instantly. Interactive calculator (open in browser): [https://nestingcalc.com/sheet-metal-gauge/](https://nestingcalc.com/sheet-metal-gauge/) ## Sheet metal gauge chart (mm & inches) | Gauge | Steel (mm) | Galvanized (mm) | Stainless (mm) | Aluminum (mm) | Steel (inch) | | --- | --- | --- | --- | --- | --- | | 3 | 6.073 | 6.073 | 6.35 | 5.827 | 0.2391 | | 4 | 5.695 | 5.695 | 5.95 | 5.189 | 0.2242 | | 5 | 5.314 | 5.314 | 5.55 | 4.620 | 0.2092 | | 6 | 4.935 | 4.935 | 5.16 | 4.115 | 0.1943 | | 7 | 4.554 | 4.554 | 4.76 | 3.665 | 0.1793 | | 8 | 4.176 | 4.176 | 4.37 | 3.264 | 0.1644 | | 9 | 3.797 | 3.797 | 3.97 | 2.906 | 0.1495 | | 10 | 3.416 | 3.510 | 3.57 | 2.588 | 0.1345 | | 11 | 3.038 | 3.132 | 3.18 | 2.304 | 0.1196 | | 12 | 2.657 | 2.743 | 2.78 | 2.053 | 0.1046 | | 13 | 2.278 | 2.413 | 2.38 | 1.803 | 0.0897 | | 14 | 1.897 | 2.108 | 1.98 | 1.628 | 0.0747 | | 15 | 1.704 | 1.905 | 1.83 | 1.448 | 0.0671 | | 16 | 1.519 | 1.702 | 1.65 | 1.290 | 0.0598 | | 17 | 1.367 | 1.498 | 1.47 | 1.151 | 0.0538 | | 18 | 1.214 | 1.295 | 1.25 | 1.024 | 0.0478 | | 19 | 1.067 | 1.147 | 1.09 | 0.912 | 0.0420 | | 20 | 0.958 | 1.016 | 0.95 | 0.813 | 0.0377 | | 21 | 0.841 | 0.902 | 0.87 | 0.723 | 0.0331 | | 22 | 0.756 | 0.815 | 0.79 | 0.644 | 0.0298 | | 23 | 0.662 | 0.728 | 0.69 | 0.573 | 0.0261 | | 24 | 0.560 | 0.635 | 0.60 | 0.511 | 0.0220 | | 25 | 0.508 | 0.559 | 0.55 | 0.455 | 0.0200 | | 26 | 0.452 | 0.511 | 0.47 | 0.405 | 0.0178 | | 27 | 0.409 | 0.462 | 0.44 | 0.361 | 0.0161 | | 28 | 0.368 | 0.417 | 0.41 | 0.321 | 0.0145 | | 29 | 0.341 | 0.384 | 0.36 | 0.286 | 0.0134 | | 30 | 0.305 | 0.343 | 0.32 | 0.255 | 0.0120 | → [Metal Weight Calculator — Rod, Tube & Bar](https://nestingcalc.com/metal-weight-calculator/) ## FAQ Why do gauge numbers run backwards? The gauge system dates to wire drawing: a higher number means more passes through the die, so thinner material. 10 gauge steel is 3.4 mm while 26 gauge is 0.45 mm. Is gauge the same for all metals? No — gauge tables differ between steel, stainless, galvanized steel and aluminum. A 16-gauge aluminum sheet is thinner (1.29 mm) than 16-gauge steel (1.52 mm). The calculator uses each material's own table. Gauge or mm — which should I order? Metric thickness removes ambiguity. If your supplier works in gauge, always confirm the mm equivalent from their table before cutting or bending. How thick is 16 gauge steel in inches? 16 gauge mild steel is 1.519 mm = 0.0598 inch (≈ 1/16"). 22 gauge is 0.756 mm = 0.0298 inch. See the full chart above for every gauge from 3 to 30. ## Related calculators - [Metal Weight Calculator — Rod, Tube & Bar](https://nestingcalc.com/metal-weight-calculator/) Weight of steel, stainless, aluminum, copper & brass rods, tubes, bars and beams in kg/m. Density table included. Free. - [Sheet Cutting Calculator](https://nestingcalc.com/sheet-cutting-calculator/) Optimize 2D cuts for plywood, MDF, glass and sheet metal — minimize waste, free. - [Feeds & Speeds Calculator](https://nestingcalc.com/feeds-speeds-calculator/) Spindle RPM and feed rate for milling — metric and imperial, free. ## Related guides - [Sheet Metal Gauge Chart: Steel, Galvanized, Stainless, Aluminum](https://nestingcalc.com/guides/sheet-metal-gauge-chart/) mm and inch thickness for every gauge number, why aluminum is not steel, and how to stop ordering the wrong sheet. - [Metal Weight Formula: Steel, Aluminum, Stainless by Profile](https://nestingcalc.com/guides/metal-weight-formula/) Weight drives shipping cost, crane planning and material budgets. 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