Planning estimate
Precision tube weight calculator
Calculate theoretical mass from geometry and nominal steel density. Results are estimates, not inspection or acceptance data.
On this page
Tube weight calculator
Round: area = π/4 × (OD² − ID²), ID = OD − 2 × wall. Square and rectangular use outer minus inner rectangles, which slightly overstates weight by ignoring corner radii. Steel density 0.2836 lb/in³ (7,850 kg/m³). Real weight varies with corners, weld upset, scale, coating, and dimensional tolerance — never accept or reject material on calculated weight alone.
Method and assumptions
The calculator subtracts the hollow area from the outside profile and multiplies by length and a nominal carbon-steel density. Square and rectangular outputs are labeled sharp-corner approximations because real cold-sized profiles have corner radii. Actual mass varies with permitted dimensional deviations, corner geometry, chemistry, coatings, and processing.
Do not use calculated mass for acceptance
Use producer data, measured mass, and the applicable standard's inspection provisions for acceptance. Confirm density separately for stainless or non-carbon grades outside this handbook's scope.
Sources and limitations
- EN 10305-1:2016 — Seamless cold drawn tubes — Scope and technical delivery conditions for seamless cold-drawn circular precision tubes.
- EN 10305-2:2016 — Welded cold drawn tubes — Scope and technical delivery conditions for welded cold-drawn circular precision tubes.
- EN 10305-3:2023 — Welded cold sized tubes — Current cold-sized tube standard; incorporates the former EN 10305-5 shaped-tube scope.
These references inform this page but do not replace the purchased standard or national adoption. Numeric chemistry, property, and tolerance requirements remain controlled standards content. The contract edition, drawing, purchase order, and applicable law govern acceptance.