1/4 inch steel plate weight
49.85 kg/m² · 10.21 lb/ft²
A 1/4 inch (6.35 mm) carbon steel plate weighs 49.85 kg per square metre: 6.350 mm × 7.85 kg/(m²·mm).
Weight of standard plate sizes
| Plate size | kg | lb |
|---|---|---|
| 4 × 8 ft | 148.2 | 326.7 |
| 4 × 10 ft | 185.2 | 408.4 |
| 5 × 10 ft | 231.5 | 510.5 |
| 8 × 20 ft | 741.0 | 1,633.5 |
Same thickness in other metals
| Material | kg/m² | lb/ft² |
|---|---|---|
| Stainless steel 304 | 50.36 | 10.31 |
| Aluminum | 17.15 | 3.51 |
| Copper | 56.90 | 11.65 |
| Brass | 53.98 | 11.05 |
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 | 0.51 | 1.13 |
| 6 × 6 in | 1.16 | 2.55 |
| 8 × 8 in | 2.06 | 4.54 |
| 10 × 10 in | 3.22 | 7.09 |
| 12 × 12 in | 4.63 | 10.21 |
| 18 × 18 in | 10.42 | 22.97 |
| 24 × 24 in | 18.52 | 40.84 |
| 48 × 48 in | 74.10 | 163.35 |
| Round disc | kg | lb |
|---|---|---|
| Ø 4 in | 0.40 | 0.89 |
| Ø 8 in | 1.62 | 3.56 |
| Ø 12 in | 3.64 | 8.02 |
| Ø 24 in | 14.55 | 32.07 |
| Ø 48 in | 58.19 | 128.30 |
For any other shape, multiply the area by 49.85 kg/m² (10.21 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 | 6.1 |
| 5 × 10 ft | 3.9 |
| 8 × 20 ft | 1.2 |
Compared with nearby thicknesses
| Thickness | kg/m² | lb/ft² | vs 1/4 inch |
|---|---|---|---|
| 1/8 in | 24.92 | 5.10 | −50 % |
| 3/16 in | 37.39 | 7.66 | −25 % |
| 1/4 in | 49.85 | 10.21 | — |
| 5/16 in | 62.31 | 12.76 | +25 % |
| 3/8 in | 74.77 | 15.31 | +50 % |
The nearest standard metric thickness is 6 mm (6.00 mm, 47.10 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 1/4 inch steel plate weigh per square foot?
10.21 lb/ft²: 0.2500 in × 40.8 lb per ft² per inch.
How much does a 4 × 8 sheet of 1/4 inch steel plate weigh?
326.7 lb (32 ft² × 10.21 lb/ft²). A 5 × 10 ft sheet weighs 510.5 lb.
What is the metric equivalent of 1/4 inch plate?
The nearest standard metric thickness is 6 mm (6.00 mm). They are not identical, so check tolerances and weights if you substitute.
How much does a 12 × 12 in piece of 1/4 inch plate weigh?
10.21 lb (1 ft² × 10.21 lb/ft²), before holes or chamfers.
How much does 1/4 inch aluminum or stainless plate weigh?
Aluminum 1/4 inch plate weighs about 17.15 kg/m², stainless steel 304 about 50.36 kg/m².
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