How to calculate pipe weight
A pipe is a hollow round section, so its weight comes from the area of the wall only. The formula is:
Weight per metre (kg/m) = π/4 × (D² − d²) × Density ÷ 1,000,000
where D is the outer diameter, d is the inner diameter (D − 2 × wall thickness), and density is 7,850 kg/m³ for carbon steel. A handy shortcut for steel is (D − t) × t × 0.02466 kg/m.
Steel pipe weight — quick reference
| Outer diameter × wall | Weight (kg/m) |
|---|---|
| 26.9 × 2.6 mm | 1.56 |
| 33.7 × 3.2 mm | 2.41 |
| 42.4 × 3.2 mm | 3.09 |
| 60.3 × 3.6 mm | 5.03 |
| 88.9 × 4.0 mm | 8.38 |
| 114.3 × 4.5 mm | 12.18 |
| 168.3 × 5.0 mm | 20.14 |