Calculating Steel Weight
Knowing the exact weight of steel reinforcement (rebar), beams, or piping is essential for structural engineering, logistics, and cost estimation. Our Steel Weight Calculator uses the standard density of steel to provide accurate estimates for various shapes including Round bars, Square bars, Flat bars, and Hollow pipes. If you are also managing masonry work, check out our Block Calculator for precise material estimation.
The calculations assume a standard steel density of approximately 490 lbs/ft³ (7850 kg/m³).
Weight Calculation Formula
The weight is derived from Volume × Density.
- Round Bar (Rebar): Volume = π × r² × Length
- Square Bar: Volume = Side² × Length
- Flat Plate: Volume = Width × Thickness × Length
- Hollow Pipe: Volume = π × (Outer Radius² - Inner Radius²) × Length
Tip: For standard rebar, you can also use the formula Weight (lbs/ft) = (Diameter in inches)² × 2.67.
Common Steel Densities
| Material | Density (lbs/in³) | Density (kg/m³) |
|---|---|---|
| Mild Steel | 0.2833 | 7850 |
| Stainless Steel (304) | 0.29 | 8000 |
| Aluminum | 0.098 | 2700 |
*This calculator uses Mild Steel density by default. For extensive details on metal densities, refer to Wikipedia's Density Table.