Round steel
Calculate the weight of round bars from diameter and length — per piece, per metre and in total.
Inputs
Result
Total weight
- Weight per piece
- 2.47 kg
- Weight per metre
- 2.466 kg/m
Calculation
How is the weight of round steel calculated?
A round bar is a cylinder. The circular cross-section and the length give the volume; multiplied by the material density, that gives the weight.
Formula
m = π × (Ø ÷ 2)² × L × ρ
- Ø = diameter in mm
- L = length in mm
- ρ = density (steel: 7.85 kg/dm³)
- m = weight per bar — multiplied by the quantity it gives the total weight
Example: a Ø 20 mm round bar weighs about 2.47 kg per metre. For other materials the respective density is used.
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