1/2 inch steel plate weight
99.70 kg/m² · 20.42 lb/ft²
A 1/2 inch (12.70 mm) carbon steel plate weighs 99.70 kg per square metre: 12.700 mm × 7.85 kg/(m²·mm).
Weight of standard plate sizes
| Plate size | kg | lb |
|---|---|---|
| 4 × 8 ft | 296.4 | 653.4 |
| 4 × 10 ft | 370.5 | 816.8 |
| 5 × 10 ft | 463.1 | 1,021.0 |
| 8 × 20 ft | 1,481.9 | 3,267.1 |
Same thickness in other metals
| Material | kg/m² | lb/ft² |
|---|---|---|
| Stainless steel 304 | 100.71 | 20.63 |
| Aluminum | 34.29 | 7.02 |
| Copper | 113.79 | 23.31 |
| Brass | 107.95 | 22.11 |
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 | 1.03 | 2.27 |
| 6 × 6 in | 2.32 | 5.10 |
| 8 × 8 in | 4.12 | 9.08 |
| 10 × 10 in | 6.43 | 14.18 |
| 12 × 12 in | 9.26 | 20.42 |
| 18 × 18 in | 20.84 | 45.94 |
| 24 × 24 in | 37.05 | 81.68 |
| 48 × 48 in | 148.19 | 326.71 |
| Round disc | kg | lb |
|---|---|---|
| Ø 4 in | 0.81 | 1.78 |
| Ø 8 in | 3.23 | 7.13 |
| Ø 12 in | 7.27 | 16.04 |
| Ø 24 in | 29.10 | 64.15 |
| Ø 48 in | 116.39 | 256.59 |
For any other shape, multiply the area by 99.70 kg/m² (20.42 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 | 3.1 |
| 5 × 10 ft | 2.0 |
| 8 × 20 ft | 0.6 |
Compared with nearby thicknesses
| Thickness | kg/m² | lb/ft² | vs 1/2 inch |
|---|---|---|---|
| 5/16 in | 62.31 | 12.76 | −38 % |
| 3/8 in | 74.77 | 15.31 | −25 % |
| 1/2 in | 99.70 | 20.42 | — |
| 5/8 in | 124.62 | 25.52 | +25 % |
| 3/4 in | 149.54 | 30.63 | +50 % |
The nearest standard metric thickness is 12 mm (12.00 mm, 94.20 kg/m²). This thickness is common for column base plates, end plates, splice plates, heavy gussets, machine frames and bridge stiffeners.
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 1/2 inch steel plate weigh per square foot?
20.42 lb/ft²: 0.5000 in × 40.8 lb per ft² per inch.
How much does a 4 × 8 sheet of 1/2 inch steel plate weigh?
653.4 lb (32 ft² × 20.42 lb/ft²). A 5 × 10 ft sheet weighs 1,021.0 lb.
What is the metric equivalent of 1/2 inch plate?
The nearest standard metric thickness is 12 mm (12.00 mm). They are not identical, so check tolerances and weights if you substitute.
How much does a 12 × 12 in piece of 1/2 inch plate weigh?
20.42 lb (1 ft² × 20.42 lb/ft²), before holes or chamfers.
How much does 1/2 inch aluminum or stainless plate weigh?
Aluminum 1/2 inch plate weighs about 34.29 kg/m², stainless steel 304 about 100.71 kg/m².
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