11 gauge stainless steel thickness
11 gauge stainless steel is 0.1250 in (3.18 mm) thick, per the U.S. Standard Gauge (stainless sheet chart). The same gauge number means a different thickness in other metals: steel 0.1196 in.
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| Material | Gauge standard | Thickness (in) | Thickness (mm) | kg/m² |
|---|---|---|---|---|
| Steel | Manufacturers' Standard Gauge | 0.1196 | 3.04 | 23.85 |
| Stainless steel (this page) | U.S. Standard Gauge (stainless sheet chart) | 0.1250 | 3.18 | 25.18 |
| Gauge | Thickness (in) | Thickness (mm) | kg/m² | lb/ft² |
|---|---|---|---|---|
| 10 ga | 0.1406 | 3.57 | 28.32 | 5.80 |
| 11 ga (this page) | 0.1250 | 3.18 | 25.18 | 5.16 |
| 12 ga | 0.1094 | 2.78 | 22.04 | 4.51 |
| 14 ga | 0.0781 | 1.98 | 15.73 | 3.22 |
| 16 ga | 0.0625 | 1.59 | 12.59 | 2.58 |
| 18 ga | 0.0500 | 1.27 | 10.07 | 2.06 |
| 20 ga | 0.0375 | 0.95 | 7.55 | 1.55 |
Practical notes
Gauge is a convention, not a unit: a higher gauge number is thinner, and steps are not even. 11 gauge is 0.1250 in for stainless steel sheet (304 / 316), but steel 0.1196 in. Put the decimal thickness on drawings and purchase orders to avoid mix-ups.
Mills supply sheet to a thickness tolerance (ASTM A568 / A480 / EN 10131), so a measured sheet can be a few thousandths of an inch off the nominal value. Measure with a micrometer before calculating bend allowances or press-fit clearances.
Weight per area here is thickness × density (304 stainless, 7.93 g/cm³): 3.18 mm × 7.93 = 25.18 kg/m². Multiply by the sheet area for blank weight; a 4 × 8 ft sheet is 2.973 m², so about 74.9 kg (165.0 lb).
Some mills supply stainless to the Manufacturers' Standard Gauge nominal instead of the U.S. Standard Gauge values in this table (e.g. 16 ga as 0.0598 in rather than 0.0625 in), so check the mill certificate.
FAQ
How thick is 11 gauge stainless steel?
0.1250 in, which is 3.18 mm, per the U.S. Standard Gauge (stainless sheet chart).
How thick is 11 gauge in mm?
For stainless steel, 11 gauge is 3.18 mm. In other metals: steel 3.04 mm.
How much does 11 gauge stainless steel weigh?
About 25.18 kg per square metre (5.16 lb per square foot), using 304 stainless, 7.93 g/cm³.
Is 11 gauge thicker than 10 gauge?
No. Higher gauge numbers are thinner: 10 ga stainless steel is 0.1406 in, 11 ga is 0.1250 in.
Sources: Stainless steel: U.S. Standard Gauge (stainless sheet chart) · Densities: EN 10025 / ASTM A1008 (steel), ASTM A240 (stainless), Aluminum Association (5052) · 1 in = 25.4 mm (exact)
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