Steel weight calculator: rebar, sheet and tube
Estimate your order before requesting a quote. Enter the section, dimensions, length and quantity to see weight per metre, per piece and for the whole order.
Section dimensions
- Per metre
- kg/m
- Per piece
- kg
- Estimated total
- kg
Based on carbon steel at 7,850 kg/m³. Not suitable for stainless steel or aluminium.
Request price and actual order weight ↗Steel weight formulas
Section dimensions are in millimetres; L is length in metres. Each formula gives one piece in kilograms. Multiply by quantity for the order total.
- Rebar: d is nominal diameter
π × d² / 4 × L × 0.00785 - Sheet: W is width, t is thickness
W × t × L × 0.00785 - Rectangular tube: W width, H height, t wall
[W × H − (W − 2t) × (H − 2t)] × L × 0.00785 - Pipe: D outside diameter, t wall
π × t × (D − t) × L × 0.00785
Reference steel density: Tata Steel EPD (kg/m³)
Example rebar weights: 6 metre lengths
| Diameter (mm) | Per metre (kg) | 6 m piece (kg) |
|---|---|---|
| 8 | 0.395 | 2.368 |
| 10 | 0.617 | 3.699 |
| 12 | 0.888 | 5.327 |
| 14 | 1.208 | 7.250 |
| 16 | 1.578 | 9.470 |
| 18 | 1.998 | 11.985 |
| 20 | 2.466 | 14.797 |
| 22 | 2.984 | 17.904 |
| 25 | 3.853 | 23.120 |
| 32 | 6.313 | 37.880 |
These values use the geometric formula; they are not a particular mill’s weight table.
Using the estimate when buying
Why can actual weight differ?
Dimensional tolerances, ribs, tube corner radii, welds and coatings affect actual weight. Use this for an initial estimate. Confirm billable weight against the order terms, mill specifications or weighbridge.
What about beams, angles and channels?
Use the standard or mill table for that exact section and size. Flanges, webs and corner radii cannot be represented accurately by a simple rectangle. Send the section, standard, size and length to sales.