1/8 inch steel plate weight
24.92 kg/m² · 5.10 lb/ft²
A 1/8 inch (3.18 mm) carbon steel plate weighs 24.92 kg per square metre: 3.175 mm × 7.85 kg/(m²·mm).
Weight of standard plate sizes
| Plate size | kg | lb |
|---|---|---|
| 4 × 8 ft | 74.1 | 163.4 |
| 4 × 10 ft | 92.6 | 204.2 |
| 5 × 10 ft | 115.8 | 255.2 |
| 8 × 20 ft | 370.5 | 816.8 |
Same thickness in other metals
| Material | kg/m² | lb/ft² |
|---|---|---|
| Stainless steel 304 | 25.18 | 5.16 |
| Aluminum | 8.57 | 1.76 |
| Copper | 28.45 | 5.83 |
| Brass | 26.99 | 5.53 |
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 | 0.26 | 0.57 |
| 6 × 6 in | 0.58 | 1.28 |
| 8 × 8 in | 1.03 | 2.27 |
| 10 × 10 in | 1.61 | 3.54 |
| 12 × 12 in | 2.32 | 5.10 |
| 18 × 18 in | 5.21 | 11.49 |
| 24 × 24 in | 9.26 | 20.42 |
| 48 × 48 in | 37.05 | 81.68 |
| Round disc | kg | lb |
|---|---|---|
| Ø 4 in | 0.20 | 0.45 |
| Ø 8 in | 0.81 | 1.78 |
| Ø 12 in | 1.82 | 4.01 |
| Ø 24 in | 7.27 | 16.04 |
| Ø 48 in | 29.10 | 64.15 |
For any other shape, multiply the area by 24.92 kg/m² (5.10 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 | 12.2 |
| 5 × 10 ft | 7.8 |
| 8 × 20 ft | 2.4 |
Compared with nearby thicknesses
The nearest standard metric thickness is 3 mm (3.00 mm, 23.55 kg/m²). Plate this thin is usually sold as sheet and used for covers, cladding, ducting, panels and light brackets.
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 1/8 inch steel plate weigh per square foot?
5.10 lb/ft²: 0.1250 in × 40.8 lb per ft² per inch.
How much does a 4 × 8 sheet of 1/8 inch steel plate weigh?
163.4 lb (32 ft² × 5.10 lb/ft²). A 5 × 10 ft sheet weighs 255.2 lb.
What is the metric equivalent of 1/8 inch plate?
The nearest standard metric thickness is 3 mm (3.00 mm). They are not identical, so check tolerances and weights if you substitute.
How much does a 12 × 12 in piece of 1/8 inch plate weigh?
5.10 lb (1 ft² × 5.10 lb/ft²), before holes or chamfers.
How much does 1/8 inch aluminum or stainless plate weigh?
Aluminum 1/8 inch plate weighs about 8.57 kg/m², stainless steel 304 about 25.18 kg/m².
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