10 gauge steel thickness and weight
0.1345 in · 3.42 mm · 5.493 lb/ft²
10 gauge sheet steel (Manufacturers' Standard Gauge) is 0.1345 in, or 3.42 mm, thick. It weighs 5.493 lb per square foot (26.82 kg/m²).
Weight of common sheet sizes
| Sheet | lb | kg |
|---|---|---|
| 4 × 8 ft | 175.8 | 79.7 |
| 4 × 10 ft | 219.7 | 99.7 |
| 5 × 10 ft | 274.6 | 124.6 |
| 1000 × 2000 mm | 118.2 | 53.6 |
| 1250 × 2500 mm | 184.8 | 83.8 |
| 1500 × 3000 mm | 266.1 | 120.7 |
10 gauge in other metals
| Material | Thickness (in) | Thickness (mm) | kg/m² |
|---|---|---|---|
| Sheet steel | 0.1345 | 3.42 | 26.82 |
| Galvanized steel | 0.1382 | 3.51 | 27.56 |
| Stainless steel | 0.1406 | 3.57 | 28.32 |
| Aluminum | 0.1019 | 2.59 | 6.99 |
Gauge numbers are tied to the material, so 10 gauge aluminum is not the same thickness as 10 gauge steel. When ordering, give the thickness in inches or millimetres.
Compared with nearby gauges
| Gauge | in | mm | lb/ft² | Thickness vs 10 ga |
|---|---|---|---|---|
| 7 gauge | 0.1793 | 4.55 | 7.322 | +33 % |
| 8 gauge | 0.1644 | 4.18 | 6.714 | +22 % |
| 9 gauge | 0.1495 | 3.80 | 6.105 | +11 % |
| 10 gauge | 0.1345 | 3.42 | 5.493 | — |
| 11 gauge | 0.1196 | 3.04 | 4.884 | −11 % |
| 12 gauge | 0.1046 | 2.66 | 4.272 | −22 % |
| 13 gauge | 0.0897 | 2.28 | 3.663 | −33 % |
A lower gauge number means a thicker sheet. The steps between gauges are not equal, because the gauge system started as a measure of weight per square foot rather than of thickness.
Metric and fractional equivalents
Outside the US, sheet is ordered in millimetres. The nearest standard metric thickness to 10 gauge (3.42 mm) is 3 mm, which weighs 23.55 kg/m². The nearest fraction of an inch is 9/64 in (0.1406 in). If a drawing calls for 10 gauge and you buy metric sheet, check whether the small difference in thickness matters for bending, welding or fit.
Weight of strips
Weight per running foot of a 10 gauge strip, for sheared blanks and formed parts.
| Strip width | lb per foot of length |
|---|---|
| 6 in | 2.75 |
| 12 in | 5.49 |
| 24 in | 10.99 |
| 36 in | 16.48 |
| 48 in | 21.97 |
Where 10 gauge is used
Gauges this heavy are used for truck beds, trailer floors, brackets, machine bases, tanks and heavy guards. Thickness tolerances for cold-rolled and hot-rolled sheet are set by ASTM A568 and depend on width, so the measured thickness can be a few thousandths of an inch off the nominal gauge value.
Frequently asked questions
How thick is 10 gauge steel in mm?
10 gauge sheet steel is 3.42 mm (0.1345 in). The nearest standard metric sheet is 3 mm.
How much does a 4 × 8 sheet of 10 gauge steel weigh?
About 175.8 lb (79.7 kg): 5.493 lb/ft² × 32 ft².
Is 10 gauge thicker than 11 gauge?
Yes. A lower gauge number is thicker: 10 gauge is 0.1345 in, 11 gauge is 0.1196 in, and 9 gauge is 0.1495 in.
Is 10 gauge the same as 9/64 inch?
Close: 10 gauge is 0.1345 in and 9/64 in is 0.1406 in. Material ordered as 9/64 in is made to that fractional thickness, so it is about 5 % thicker than 10 gauge.
How thick is 10 gauge galvanized steel?
0.1382 in (3.51 mm), slightly more than plain 10 gauge because the gauge includes the zinc coating.
Is 10 gauge aluminum the same thickness as steel?
No. 10 gauge aluminum is 0.1019 in (2.59 mm); aluminum uses a different gauge table.
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Data adapted from Wikipedia, "Sheet metal" (CC BY-SA 4.0).