3/8 inch steel plate weight
74.77 kg/m² · 15.31 lb/ft²
A 3/8 inch (9.52 mm) carbon steel plate weighs 74.77 kg per square metre: 9.525 mm × 7.85 kg/(m²·mm).
Weight of standard plate sizes
| Plate size | kg | lb |
|---|---|---|
| 4 × 8 ft | 222.3 | 490.1 |
| 4 × 10 ft | 277.9 | 612.6 |
| 5 × 10 ft | 347.3 | 765.7 |
| 8 × 20 ft | 1,111.4 | 2,450.3 |
Same thickness in other metals
| Material | kg/m² | lb/ft² |
|---|---|---|
| Stainless steel 304 | 75.53 | 15.47 |
| Aluminum | 25.72 | 5.27 |
| Copper | 85.34 | 17.48 |
| Brass | 80.96 | 16.58 |
Weight of cut pieces
Base plates, gussets, cleats and flange blanks are cut from plate. Weights below are for the full square or disc, before holes, slots or chamfers.
| Square piece | kg | lb |
|---|---|---|
| 4 × 4 in | 0.77 | 1.70 |
| 6 × 6 in | 1.74 | 3.83 |
| 8 × 8 in | 3.09 | 6.81 |
| 10 × 10 in | 4.82 | 10.63 |
| 12 × 12 in | 6.95 | 15.31 |
| 18 × 18 in | 15.63 | 34.46 |
| 24 × 24 in | 27.79 | 61.26 |
| 48 × 48 in | 111.14 | 245.03 |
| Round disc | kg | lb |
|---|---|---|
| Ø 4 in | 0.61 | 1.34 |
| Ø 8 in | 2.42 | 5.35 |
| Ø 12 in | 5.46 | 12.03 |
| Ø 24 in | 21.82 | 48.11 |
| Ø 48 in | 87.29 | 192.45 |
For any other shape, multiply the area by 74.77 kg/m² (15.31 lb/ft²). For a ring or a plate with a hole, subtract the hole's area.
Sheets per short ton
| Sheet size | Sheets |
|---|---|
| 4 × 8 ft | 4.1 |
| 5 × 10 ft | 2.6 |
| 8 × 20 ft | 0.8 |
Compared with nearby thicknesses
| Thickness | kg/m² | lb/ft² | vs 3/8 inch |
|---|---|---|---|
| 1/4 in | 49.85 | 10.21 | −33 % |
| 5/16 in | 62.31 | 12.76 | −17 % |
| 3/8 in | 74.77 | 15.31 | — |
| 1/2 in | 99.70 | 20.42 | +33 % |
| 5/8 in | 124.62 | 25.52 | +67 % |
The nearest standard metric thickness is 10 mm (10.00 mm, 78.50 kg/m²). This thickness is common for base plates of light columns, gussets, brackets, cleats, stiffeners, chequer plate floors and tank shells.
Hot-rolled plate is made to a thickness tolerance (EN 10029 in Europe, ASTM A6 in the US). These tolerances allow more over-thickness than under-thickness, so weighbridge weights can come out a little above the theoretical weight.
Frequently asked questions
How much does 3/8 inch steel plate weigh per square foot?
15.31 lb/ft²: 0.3750 in × 40.8 lb per ft² per inch.
How much does a 4 × 8 sheet of 3/8 inch steel plate weigh?
490.1 lb (32 ft² × 15.31 lb/ft²). A 5 × 10 ft sheet weighs 765.7 lb.
What is the metric equivalent of 3/8 inch plate?
The nearest standard metric thickness is 10 mm (10.00 mm). They are not identical, so check tolerances and weights if you substitute.
How much does a 12 × 12 in piece of 3/8 inch plate weigh?
15.31 lb (1 ft² × 15.31 lb/ft²), before holes or chamfers.
How much does 3/8 inch aluminum or stainless plate weigh?
Aluminum 3/8 inch plate weighs about 25.72 kg/m², stainless steel 304 about 75.53 kg/m².
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