Coil Weight Calculator

Coil Weight Formula:

\[ W = \pi \times \left(\left(\frac{OD}{2}\right)^2 - \left(\frac{ID}{2}\right)^2\right) \times Width \times Density \]

Outer Diameter (OD):

Inner Diameter (ID):

Width:

Density:

kg/m³

Coil Weight (kg):

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1. What is a Coil Weight Calculator?

Definition: This calculator estimates the weight of a coil based on its dimensions (outer diameter, inner diameter, width) and material density.

Purpose: It helps metal workers, engineers, and manufacturers determine the weight of coiled materials like steel, aluminum, or other metals.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ W = \pi \times \left(\left(\frac{OD}{2}\right)^2 - \left(\frac{ID}{2}\right)^2\right) \times Width \times Density \]

Where:

\( W \) — Weight of coil (kg)
\( OD \) — Outer diameter (m)
\( ID \) — Inner diameter (m)
\( Width \) — Width of coil (m)
\( Density \) — Material density (kg/m³)

Explanation: The formula calculates the cross-sectional area of the coil (annular area) multiplied by width to get volume, then multiplied by density to get weight.

3. Importance of Coil Weight Calculation

Details: Accurate coil weight estimation is crucial for transportation, storage, pricing, and production planning in metal industries.

4. Using the Calculator

Tips: Enter all dimensions in meters. Default density is 7850 kg/m³ (steel). All values must be > 0 and OD > ID.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical density for steel coils?
A: Most carbon steel has a density of about 7850 kg/m³, while stainless steel is around 8000 kg/m³.

Q2: How do I convert the result to pounds?
A: Multiply the kg result by 2.20462 to get pounds.

Q3: What if my coil isn't perfectly round?
A: This calculation assumes perfect cylindrical coils. For irregular shapes, consider adding a safety factor.

Q4: Why is inner diameter important?
A: The ID accounts for the hollow center of the coil, which doesn't contain material.

Q5: Can I use this for non-metal materials?
A: Yes, as long as you know the material's density in kg/m³.