Sheet Metal Gauge Chart
Sheet metal gauge chart for steel, stainless, galvanised steel, and aluminium
Look up sheet metal gauge thickness in inches and millimetres by material.
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How this chart works
Sheet metal gauge is not one universal thickness scale. The same gauge number can mean a different thickness depending on the material.
Select the material you are working with
Find the gauge number
Check the thickness in inches or millimetres
Use the thickness for quoting, estimating, weight calculations, and material planning
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FAQs
Yes. In sheet metal, a lower gauge number means thicker material. 16 gauge is thicker than 18 gauge.
Gauge is a reference number used to describe sheet metal thickness. The gauge number is not the same as the thickness, and it can vary by material.
Different materials use different gauge standards. Stainless steel and plain steel do not always share the same gauge-to-thickness values.
16 gauge steel is commonly listed as 1.52 mm, or 0.0598 inches. Confirm against the material standard or supplier if exact thickness matters.
Find the gauge number in the chart, then use the column for your material. Do not use one universal gauge value across steel, galvanised steel, stainless steel, and aluminium.
You can use it as one input in your quoting process, but it should not be the only input. Accurate quoting also needs to account for material, labour, machine rates, overhead, secondary processes, and margin.
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