Calculate Metal Weight
Metal Weight Calculator (kg & lb) for Plates, Coils, Bars & Tubes
Use this calculator to estimate metal weight based on geometry and density. It is designed for procurement, quotation, logistics planning, and quick shop-floor checks. Results include kilograms, pounds, and an approximate pieces-per-metric-ton reference.
Note: Quick estimates only. For engineering, pressure-rated, or code-compliant work, validate against drawings, applicable standards, and third-party verification where required. Angle/Channel/H-Beam use simplified geometry (no fillet radii).
Why Accurate Metal Weight Matters
Weight is a commercial and operational control point across the supply chain. Buyers rely on it to compare offers and validate quotations, logistics teams use it to plan container loading, and engineers use it for structural and fabrication assumptions. Small calculation errors can lead to budget overruns, shipment delays, or avoidable rework.
The Core Principle
Weight = Volume × Density. The difference between product forms lies in how volume is calculated.
Common Volume Formulas by Product Form
| Product Form | Volume (V) | Notes |
|---|---|---|
| Plate / Sheet / Flat | V = t × W × L | Rectangular volume |
| Round Bar | V = (π × D² / 4) × L | Solid cylinder |
| Round Tube | V = (π × (OD² − ID²) / 4) × L | Hollow cylinder |
| Rectangular / Square Tube | V = (W×H − (W−2t)×(H−2t)) × L | Box section (simplified) |
| Angle (L-Section) | Area ≈ t × (A + B − t), then V = Area × L | Simplified without fillet radii |
| Channel (U/C-Section) | Area ≈ H×B − (H−2tf)×(B−tw), then V = Area × L | Simplified geometry |
| H-Beam / I-Beam | Area ≈ 2(B×tf) + (H−2tf)×tw, then V = Area × L | Simplified geometry |
| Coil (by Length) | V = W × t × L | Best when length is known |
| Coil (by OD / ID) | V = (π/4) × (OD² − ID²) × W | Assumes tight winding (estimate) |
Typical Density Reference (kg/m³)
Density varies by grade family and mill practice. For contract-critical work, verify against MTC/CoC and drawings.
| Material | Density (kg/m³) | Typical Use |
|---|---|---|
| Stainless Steel 304 / 304L | 7930 | General fabrication, food equipment |
| Stainless Steel 316L | 7990 | Chloride exposure, chemical service |
| Duplex 2205 | 7800 | Higher strength / chloride resistance |
| Carbon Steel | 7850 | Structures, general engineering |
| Aluminum 6061 | 2700 | Lightweight structures |
| Copper | 8960 | Electrical and thermal applications |
| Brass | 8500 | Machined components |
| Titanium Grade 2 | 4510 | Corrosive media, weight-sensitive |
| Nickel Alloy 625 | 8440 | High corrosion / temperature |
Practical Examples
Example 1: 304 Stainless Steel Plate
Thickness = 5 mm, Width = 1500 mm, Length = 6000 mm
Volume = 0.005 × 1.5 × 6.0 = 0.045 m³
Weight = 0.045 × 7930 = 356.9 kg (approx.)
Example 2: Duplex 2205 Pipe
OD = 114 mm, Wall Thickness = 6 mm, Length = 6000 mm
ID = 114 − 2×6 = 102 mm
Volume = (π × (0.114² − 0.102²) / 4) × 6 = 0.01221 m³
Weight = 0.01221 × 7800 = 95.3 kg (approx.)
Frequently Asked Questions
What if my alloy or grade is not listed?
Select “Custom” and enter the density manually. For contract-critical work, use the value stated on the material certificate when available.
How accurate are the results?
This tool provides quick commercial estimates using standard geometry and reference densities. For safety-critical or code-compliant applications, validate against drawings and standards.
Can I use this for shipping cost and container planning?
Yes. Weight supports freight selection, container loading plans, and transport compliance checks.
Does it calculate both kilograms and pounds?
Yes. The calculator outputs both kg and lb automatically, plus an approximate pieces-per-metric-ton reference.
Related Resources on LYH Steel
- News: Stainless Steel Market Updates
- Export News: Shipments, Orders & Projects
- Stainless Steel Sheet & Plate
- Stainless Steel Strip & Coil
- Stainless Steel Pipe & Tube
About LYH Steel
LYH Steel is a China-based supplier focused on stainless steel, carbon steel, and coated steel products. We integrate sourcing, stockholding, processing, and export logistics to support industrial buyers with consistent quality and lead time control. If you need a fast quotation or packing plan support, please reach out via the inquiry form or WhatsApp on the site.
