Steel Plate Weight Calculator
Quickly calculate the weight of carbon steel, stainless steel, and aluminum plates. Enter dimensions and get instant, accurate results.
Calculate Steel Plate Weight
Select material, enter length, width, thickness and quantity to get weight per piece, per square meter and total weight.
mm
mm
mm
pieces
Per Square Meter
—
kg/m²
Per Piece
—
kg
Total Weight
—
kg
How to Use This Calculator
- Select material — Choose from carbon steel, stainless steel, aluminum, copper, or enter custom density.
- Enter dimensions — Input plate length, width, and thickness in millimeters.
- Set quantity — Enter the number of plates.
- Click "Calculate" — View weight per square meter, per piece, and total weight.
Weight Calculation Formula
Steel Plate Weight Formula
Weight (kg) = Length (m) × Width (m) × Thickness (mm) × Density (kg/m³) ÷ 1000
W = L × W × T × ρ / 1,000,000* L, W in meters; T in mm; ρ in kg/m³. For carbon steel: kg/m² ≈ 7.85 × T(mm)
Material Density Reference (kg/m³)
- Carbon Steel (ASTM A36) — 7,850 kg/m³
- Stainless Steel 304 — 7,930 kg/m³
- Stainless Steel 316 — 8,000 kg/m³
- Stainless Steel 430 — 7,750 kg/m³
- Duplex 2205 — 7,800 kg/m³
- Aluminum — 2,710 kg/m³
- Copper — 8,940 kg/m³
Carbon Steel Plate Weight by Thickness (kg/m²)
Based on density 7,850 kg/m³. Simplified formula: W(kg/m²) ≈ 7.85 × T(mm)
| Thickness (mm) | kg/m² | Thickness (mm) | kg/m² | Thickness (mm) | kg/m² |
|---|
Common Steel Plate Sizes & Standards
Standard dimensions and applications for structural and pressure vessel plates.
| Thickness | Typical Grade | Common Applications |
|---|---|---|
| 1/4" (6.35 mm) | ASTM A36 / Q235B | Base plates, light structural parts |
| 1/2" (12.7 mm) | ASTM A36, A572, Q345B | Bridges, medium structural elements |
| 1" (25.4 mm) | ASTM A516, ASTM A36 | Pressure vessels, heavy machinery, shipbuilding |
| 2" (50.8 mm) | ASTM A516 Gr70, API 5L | Oil & gas pipelines, offshore platforms |
| 4" (101.6 mm) | ASTM A514, Q460 | Crane bases, hydropower, high-rise cores |
| 6" (152.4 mm) | ASTM A514, A709 | Nuclear structures, bridge piers |
International Plate Standards
- ASTM A36 — Carbon structural steel (yield 250 MPa)
- ASTM A572 — HSLA structural steel (Gr 50: 345 MPa)
- ASTM A516 — Pressure vessel plates, moderate/low temp service
- EN 10025 S235/S275/S355 — European structural steel
- JIS G3101 SS400 — Japanese general structural steel
- GB/T 700 Q235 / GB/T 1591 Q345 — Chinese carbon & HSLA steel
ASTM A6/A6M Plate Tolerances
ASTM A6 defines general requirements for structural steel plates, including dimensional tolerances.
- Thickness tolerance: ±0.25 mm to ±6.35 mm depending on thickness
- Width & Length tolerance: ±3 mm to ±50 mm (size dependent)
- Standard plate sizes: 48" × 96" (1220×2440 mm), 60" × 120" (1524×3048 mm), 96" × 240" (2438×6096 mm)
- Actual weight may vary ±2-3% due to mill tolerances
Frequently Asked Questions
How accurate is the steel plate weight calculator?
This calculator provides theoretical weight based on nominal dimensions and standard density. Actual weight may vary by ±2-5% due to manufacturing tolerances (ASTM A6/A6M). For exact weights, refer to mill test certificates.
What is the formula for steel plate weight?
Weight (kg) = Length (m) × Width (m) × Thickness (mm) × Density (kg/m³) ÷ 1000. For carbon steel, a quick estimate is: kg/m² ≈ 7.85 × Thickness (mm).
What is the density of stainless steel plate?
Austenitic grades (304/316): ~7,930–8,000 kg/m³. Ferritic (430): ~7,750 kg/m³. Duplex 2205: ~7,800 kg/m³. Always confirm with your supplier for precise values.
What are standard steel plate sizes?
Common sizes: 4'×8' (1220×2440 mm), 5'×10' (1524×3048 mm), 6'×20' (1829×6096 mm), 8'×20' (2438×6096 mm). Custom sizes available up to 120" width and 480" length.
How much does a 10mm steel plate weigh per square meter?
Carbon steel (7,850 kg/m³): 10 mm × 7.85 = 78.5 kg/m². Stainless steel 304: ~79.3 kg/m². Aluminum: ~27.1 kg/m².
