Weight calculator
Steel Weight Calculator
Calculate the theoretical weight of steel sheet, round pipe, square and rectangular tube, angles, flat bars and solid bars from their dimensions — then request a price for the same quantity.
- Weight per piece
- 423.90 kg
- Total weight (10 pcs)
- 4,239.0 kg≈ 4.239 t
Theoretical weight from nominal dimensions for carbon steel (7850 kg/m³), excluding corner/root radii and rolling tolerances; actual weight may differ slightly. Beams (IPE / HEA / HEB / UPN) are weighed from standard section tables.
Steel weight formulas
Weight = cross-section area × length × steel density (7850 kg/m³). In practice: kg per metre = section area in mm² × 0.00785.
| Product | Weight (kg) | Example |
|---|---|---|
| Sheet / plate | length (m) × width (m) × thickness (mm) × 7.85 | 6000 × 1500 × 6 mm = 423.9 kg |
| Round pipe | 0.02466 × (OD − t) × t × L | 114.3 × 4 mm = 10.88 kg/m |
| Square / rectangular tube | 2t × (A + B − 2t) × 0.00785 × L | 100 × 50 × 3 mm = 6.78 kg/m |
| Angle | t × (A + B − t) × 0.00785 × L | 50 × 50 × 5 mm = 3.73 kg/m |
| Flat bar | W × t × 0.00785 × L | 40 × 5 mm = 1.57 kg/m |
| Round bar | d² × 0.006165 × L | Ø20 mm = 2.466 kg/m |
| Square bar | a² × 0.00785 × L | 20 × 20 mm = 3.14 kg/m |
Frequently asked questions
How do I calculate the weight of a steel plate?
Multiply length (m) × width (m) × thickness (mm) × 7.85. Example: a 6000 × 1500 × 6 mm plate weighs 6 × 1.5 × 6 × 7.85 ≈ 423.9 kg.
What does a 40 × 5 mm flat bar weigh per metre?
Section area 40 × 5 = 200 mm², so weight = 200 × 0.00785 = 1.57 kg per metre, or 9.42 kg for a 6 m bar.
How do I calculate round pipe weight?
Weight per metre = 0.02466 × (outside diameter − wall thickness) × wall thickness, in mm. Example: 114.3 × 4 mm pipe ≈ 10.88 kg per metre.
Is the calculated weight the delivered weight?
It is a theoretical weight from nominal dimensions. Actual weight can differ slightly because of rolling tolerances and corner radii on tubes and angles, so quotations use actual or table weights.