Inputs
Results
Per-piece weight
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Weight per length: —
Total weight
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With wastage: —
| # | Bundle/Note | Profile | Dims | Len / pc | Pieces | Density | kg/pc | Total kg | Gross kg |
|---|
Formula Used
Unit conversions
- mm → m: value × 0.001
- in → m: value × 0.0254
- ft → m: value × 0.3048
Cross‑sectional area
- Round tube:
A = π/4 × (OD² − ID²), whereID = OD − 2t - Square tube:
A = B² − (B − 2t)² - Rectangular tube:
A = B×H − (B − 2t)×(H − 2t)
Weight
- Per piece (kg):
W = A × L × ρ - Per length:
W/L = A × ρ(kg per meter) - Gross with wastage:
Wgross = W × (1 + w/100)
All dimensions converted to meters before calculation. Density ρ in kg/m³.
How to Use
- Select profile and unit system.
- Enter outer size(s) and wall thickness.
- Provide length per piece and number of pieces.
- Choose density preset, or enable custom density.
- Optionally add wastage and a bundle label.
- Click Calculate, then Add to Results to build a list.
- Export your table as CSV or PDF when ready.
Example Data Table
| Profile | Dims | Len | Pieces | Density | kg/pc | Total kg |
|---|
Examples assume Metric inputs and Carbon Steel density.
FAQs
No. Enter structural steel thickness. Coating mass is usually small and ignored here. If needed, increase density slightly or add a small wastage percentage.
For hollow sections, the inner void must remain positive. Round:
ID = OD − 2t > 0. Rectangular/square: (B − 2t) > 0 and (H − 2t) > 0.Yes. Choose your system. Dimensions use mm or inches. Length uses meters or feet. Internally, everything converts to meters for consistent physics.
Results are engineering estimates assuming nominal sizes. Real stock may vary by mill tolerances, seam configuration, and corner radii in rectangular sections.
Select “Custom” and provide density in kg/m³ to reflect your specification or certificate of compliance.
After calculating, see “Weight per length” in the Results summary. That gives mass per meter which you can convert to per foot if required.