Pipe Weight Calculator
Steel pipe weight from OD, wall thickness, length, and density.
Calculator
No signup required. Results are indicative—verify for your standards.
Approx. metal mass: 249.9 kg
Formula
Cross-section metal area A_m = π × ((OD/2)² − (ID/2)²), ID = OD − 2t. Mass m = A_m × L × ρ_steel (typical ρ ≈ 7850 kg/m³ for carbon steel).
Example calculation
OD 219.1 mm (8" NPS), wall thickness 8.18 mm (Sch 40), L = 6 m: ID = 219.1 − 2×8.18 = 202.7 mm, A_m = π × (0.10955² − 0.10135²) ≈ 0.005486 m², mass = 0.005486 × 6 × 7850 ≈ 258 kg.
Engineering notes
Nominal sizes differ from actual OD per schedule. For coatings and insulation, add separately. Always confirm with vendor tables for procurement.
When to use this calculator
- Lifting plan preparation — calculate total pipe weight for crane selection and rigging design
- Material take-off (MTO) — estimate pipe weight for logistics, freight, and procurement budgeting
- Structural loading — provide pipe dead weight for pipe rack, support, and foundation design
- Shipping and customs — compute weight of pipe consignments for freight invoicing and customs declarations
- Inventory and warehouse management — maintain weight records for steel pipe stock
Frequently asked questions
- What is the density of different pipe materials?
- Carbon steel: 7,850 kg/m³. Stainless steel (316L): 7,980 kg/m³. Duplex stainless steel: 7,805 kg/m³. HDPE (high-density polyethylene): 950 kg/m³. GRP/FRP (glass-reinforced plastic): 1,750–2,000 kg/m³. Copper: 8,960 kg/m³. Aluminium: 2,710 kg/m³. Use the correct density for accurate weight estimates; even within stainless steel, grades vary slightly.
- How do I find the OD and wall thickness for a standard pipe schedule?
- Pipe OD is fixed by NPS (nominal pipe size) and does not change with schedule. Wall thickness varies by schedule. For example, 6" NPS pipe always has OD = 168.3 mm; Sch 40 wall = 7.11 mm, Sch 80 wall = 10.97 mm. Refer to ASME B36.10M (carbon/alloy steel) or ASME B36.19M (stainless steel) for standard dimensions, or use this calculator with the vendor datasheet values.
- Should I include the weight of flanges, fittings, and valves separately?
- Yes. This calculator covers straight pipe weight only. Flanges, elbows, tees, reducers, and valves must be added separately using vendor weight tables or standard published weights (ASME B16.5, B16.9). For MTO, a commonly used rule of thumb is to add 5–10% to the pipe weight as an allowance for fittings, or take off fittings individually for high-accuracy estimates.
- How do I calculate the weight of insulated pipe for structural design?
- Insulated pipe weight = Bare pipe weight + Insulation weight + Cladding weight + Fluid weight (if full). For insulation: approximate the insulation as a hollow cylinder with its own density (mineral wool: 80–200 kg/m³, calcium silicate: 200–300 kg/m³). Fluid weight = π × (ID/2)² × L × ρ_fluid. For large-bore, liquid-filled lines, the fluid weight often exceeds the pipe weight and dominates the structural loads.