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Round Bar Weight Calculator
Weight = π/4 × D² × L × density. The classic d²/162 formula for steel bars.
Steel Round Bar Weight (kg/m)
| Diameter | kg/m |
|---|
| 10 mm | 0.617 |
| 16 mm | 1.58 |
| 20 mm | 2.47 |
| 25 mm | 3.85 |
| 50 mm | 15.4 |
| 100 mm | 61.7 |
Formula
Weight (kg/m) = D²(mm) ÷ 162.28 for steel
General: π/4 × D² × ρ
Worked Example
Ø25 steel bar: 25² ÷ 162.28 = 3.85 kg/m.
FAQ
What is the d²/162 formula?
It is π/4 × 7850 × 10⁻⁶ simplified: steel round bar kg/m = D(mm)² ÷ 162.28.