Coil Weight Calculator
Calculate the weight of metal coils based on outer diameter (OD), inner diameter (ID), coil width, material density, and quantity. This tool is widely used in sheet metal processing, steel service centers, and procurement.
Coil Weight
Calculator
Quick Answer
- Coil Weight = π × (OD² − ID²) / 4 × Width × Density
- Units:
- OD / ID / Width → mm
- Density → g/cm³
- Output → kg
Formula
W = pi times frac times B times rho
👉 Where:
- W = Weight
- OD = Outer Diameter (mm)
- ID = Inner Diameter (mm)
- B (Width) = Coil Width (mm)
- ρ (Density) = g/cm³
How to Use
- Select material (density auto-filled)
- Enter outer diameter (OD)
- Enter inner diameter (ID)
- Input coil width
- Enter quantity
- Get total weight instantly
✔ Suitable for steel, aluminum, copper coils
✔ Real-time calculation
✔ Accurate for engineering and trading use
Unit Conversion Logic
The calculator automatically converts:
- mm³ → cm³
- grams → kilograms
👉 No manual conversion required
Common Material Density
| Material | Density (g/cm³) |
|---|---|
| Aluminum | 2.70 |
| Steel | 7.85 |
| Stainless Steel | 8.00 |
| Copper | 8.96 |
| Brass | 8.50 |
Example Calculation
Material: Steel
OD = 1200 mm
ID = 508 mm
Width = 1000 mm
Step 1: Cross-sectional area
π × (1200² − 508²) / 4 ≈ 1,026,000 mm²
Step 2: Volume
1,026,000 × 1000 = 1,026,000,000 mm³ = 1,026,000 cm³
Step 3: Weight
Weight = 1026000 times 7.85 approx 8050 kg
Engineering Insight
Why coil weight matters:
- Material purchasing & inventory control
- Logistics & shipping planning
- Production scheduling
- Cost estimation in metal processing
Practical Applications
- Steel coil trading
- Sheet metal fabrication
- Slitting & cutting operations
- Manufacturing planning
Design & Estimation Tips
- Larger OD significantly increases total weight
- Standard steel coil ID is often 508 mm or 610 mm
- Aluminum coils are much lighter (~1/3 of steel)
- Always verify actual thickness for precise results
FAQ
Is this calculation accurate?
Yes, it is accurate for standard estimation. Minor deviations may occur due to material tolerances and coil tightness.
Can I calculate coated coils?
Yes, coating weight is typically negligible unless specified.
What if I only know thickness?
This calculator uses geometry (OD/ID), but thickness-based methods can also be used separately.
Does it support multiple coils?
Yes, enter quantity to get total weight.
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- Sheet Metal Weight Calculator
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- Density Calculator
- Metal Weight Calculator
