Maker & Reference
Sheet Metal Gauge to Thickness Calculator
Gauge numbers go inversely with thickness (higher gauge = thinner). Steel, aluminum, and stainless all have slightly different scales.
Thickness (in)
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- mm
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- lb/sq ft
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- Typical use
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FAQ
Why does galvanized differ? +
Galv adds zinc coating on top of the base steel. Same nominal gauge has more actual material than uncoated.
Aluminum gauge? +
Brown & Sharpe (B&S) gauge — different scale than steel. 16 ga aluminum is thinner than 16 ga steel.