Accurate cu busbar weight calculation is the starting point for every serious procurement decision. Whether you’re designing a low-voltage switchgear panel, specifying cable tray loads, or placing a bulk order, knowing the exact copper weight per meter prevents costly surprises at delivery. This guide walks you through the complete formula, a detailed copper busbar weight chart, and a practical copper busbar weight calculator—all in one place.
For engineers, procurement managers, and EPC contractors, getting the busbar weight per meter right directly impacts three critical areas:
GRL Copper manufactures T2 electrolytic copper busbars with 99.9% purity, meaning our density values are consistent and our weight calculations are reliable across every batch.
The fundamental formula for calculating the weight of a copper flat bar (the most common busbar profile) is:
Weight (kg) = Width (m) × Thickness (m) × Length (m) × Density (kg/m³)
Where:
— Density of copper = 8,960 kg/m³ (standard value for T2 electrolytic copper)
— All dimensions must be in the same unit (meters recommended)
— For busbar weight per meter: set Length = 1 m
Suppose you need a copper flat bar with the following dimensions:
Weight = 0.10 × 0.01 × 1 × 8,960 = 8.96 kg/m
This means a 100 × 10 mm copper busbar weighs approximately 8.96 kilograms per meter. If your project requires a 6-meter run, the total copper weight would be 6 × 8.96 = 53.76 kg.
Because engineers often work in millimeters, here is the same formula rearranged for mm inputs:
Weight (kg/m) = Width (mm) × Thickness (mm) × 0.00896
The constant 0.00896 is derived from the copper density (8,960 kg/m³) divided by 1,000,000 to convert mm² to m². Bookmark this — it is the fastest path to cu busbar weight calculation in day-to-day engineering work.
Use the calculator below to get instant copper busbar kg/m and total weight results. Simply enter your flat bar dimensions and length.
⚖️ Copper Busbar Weight Calculator
| Width (mm) | |
| Thickness (mm) | |
| Length (m) | |
| Copper Density (kg/m³) |
Note: This copper busbar weight calculator uses a fixed copper density of 8,960 kg/m³, consistent with T2 electrolytic copper. For tin-plated or nickel-plated variants, the weight difference is negligible for standard plating thicknesses.
The following copper busbar weight chart lists pre-calculated busbar weight per meter values for the most common flat bar cross-sections used in power distribution, switchgear, and renewable energy applications. All values are based on copper density of 8,960 kg/m³.
| Width (mm) | Thickness (mm) | Cross Section (mm²) | Weight (kg/m) |
|---|---|---|---|
| 20 | 3 | 60 | 0.538 |
| 25 | 5 | 125 | 1.120 |
| 30 | 5 | 150 | 1.344 |
| 40 | 5 | 200 | 1.792 |
| 50 | 5 | 250 | 2.240 |
| 50 | 10 | 500 | 4.480 |
| 60 | 6 | 360 | 3.226 |
| 80 | 8 | 640 | 5.734 |
| 100 | 10 | 1,000 | 8.960 |
| 120 | 10 | 1,200 | 10.752 |
| 150 | 10 | 1,500 | 13.440 |
| 200 | 10 | 2,000 | 17.920 |
All values calculated using the standard formula: Width (mm) × Thickness (mm) × 0.00896. Cross-sectional area determines both current-carrying capacity and copper busbar kg/m.
The single most important constant in any cu busbar weight calculator is copper density. Here is a quick reference for different copper grades commonly used in busbar manufacturing:
| Copper Grade | Purity | Density (kg/m³) | Typical Application |
|---|---|---|---|
| T2 Electrolytic Copper | ≥99.9% | 8,960 | Power distribution, EV busbars |
| Oxygen-Free Copper (OFC) | ≥99.95% | 8,960 | High-frequency, audio, precision |
| Tin-Plated Copper | Cu ≥99.9% + Sn coating | ~8,960 (negligible Sn mass) | Switchgear, corrosion-prone environments |
GRL Copper exclusively uses T2 electrolytic copper with 99.9% purity for all rigid busbar products. This guarantees that the copper weight calculated above matches actual delivery weight within normal manufacturing tolerances (±3%).
Not all busbars are flat bars. Here is how the copper weight formula adapts to other common profiles:
Formula: W = Width × Thickness × Length × 8,960 (dimensions in meters)
For laminated copper busbars, weight calculation follows the same formula applied to total copper cross-section. The insulation layer adds minimal mass and is typically excluded from structural load calculations:
W = (Total copper cross-section in m²) × Length × 8,960
Copper foil soft busbars consist of multiple thin copper foil layers. Total copper weight equals the sum of all layer cross-sections multiplied by length and density. GRL provides certified weight per meter data on all product datasheets.
W = π × (D/2)² × Length × 8,960W = Side² × Length × 8,960The relationship between copper busbar kg/m and electrical performance is direct. A heavier busbar (larger cross-section) means:
As a general guideline used in low-voltage power distribution, copper busbars are rated at approximately 1.0–1.5 A per mm² of cross-sectional area at 40°C ambient. A 100 × 10 mm busbar (1,000 mm² cross-section) can therefore typically carry 1,000–1,500 A depending on installation conditions and surface treatment.
For project-specific current capacity verification, consult GRL Copper’s engineering team or request a custom product datasheet via our contact page.
Need Custom Copper Busbars for Your Project?
GRL Copper manufactures T2 electrolytic copper flat bars, laminated busbars, and flexible soft busbars to your exact dimensions. Get a certified weight datasheet with every order.
The standard formula is: Weight (kg) = Width (m) × Thickness (m) × Length (m) × 8,960. For quick calculation in millimeters, use: Weight (kg/m) = Width (mm) × Thickness (mm) × 0.00896. This copper busbar weight calculator approach applies to all flat bar profiles.
The standard density used in any cu busbar weight calculator is 8,960 kg/m³ (or equivalently 8.96 g/cm³). This applies to T2 electrolytic copper and oxygen-free copper, both used in high-quality busbar manufacturing. Tin or nickel plating adds negligible mass at standard plating thicknesses (5–15 µm).
To find busbar weight per meter, set the length to 1 meter in the formula: kg/m = Width (mm) × Thickness (mm) × 0.00896. For example, a 60 × 6 mm copper flat bar weighs 60 × 6 × 0.00896 = 3.226 kg/m. You can verify this using the interactive calculator embedded in this article.
In switchgear and distribution panel design, busbar weight determines the mechanical loading on support insulators, enclosure frames, and cable trays. Undersized supports can cause vibration-induced fatigue failure over time. Accurate copper busbar weight chart data ensures your support structures meet IEC and GB standard requirements.
Aluminum has a density of approximately 2,710 kg/m³ versus copper’s 8,960 kg/m³. This means an aluminum busbar of the same dimensions weighs about 30% as much as a copper one. However, copper carries roughly 1.6× more current per unit area, so copper busbars are typically smaller in cross-section for equivalent ampacity — partially offsetting the weight difference.
No. Standard electrolytic tin plating is 5–15 micrometers thick. For a 100 × 10 mm busbar, the tin layer adds less than 0.05 kg/m — well within normal manufacturing tolerance. All GRL Copper rigid busbar products include tin-plated options with certified weight data.
An online weight calculator using the standard formula and a fixed density of 8,960 kg/m³ is accurate to within ±1–2% for theoretical weight. Actual delivered weight may vary by ±3% due to manufacturing tolerances in cross-section dimensions. For procurement and logistics, always add a 3–5% buffer to calculated weights.
Yes, but with one adjustment: use the total copper cross-sectional area (sum of all layers), not the overall envelope dimensions. The insulation jacket, PET film, or PVC coating should be excluded from the weight calculation unless structural loading data is required. GRL Copper provides layer-by-layer weight breakdowns on all flexible busbar product specifications.
A 1,000 A panel typically uses copper busbars of 80 × 8 mm to 100 × 10 mm cross-section, depending on current density and installation conditions. Using our copper busbar weight chart: an 80 × 8 mm bar weighs 5.73 kg/m, and a 100 × 10 mm bar weighs 8.96 kg/m. For a 2-meter busbar run with three phases, total copper weight ranges from approximately 34 kg to 54 kg.
GRL Copper provides full material test reports (MTR), dimensional inspection certificates, and weight-per-meter data for all standard and custom busbar orders. Contact our team or request a quote through our Support Services page.
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From rigid flat bars to laminated flexible busbars — all manufactured to IEC standards, available in custom dimensions.
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