Steel Coil Weight Calculator

Steel Coil Weight Formula:

\[ Weight = \pi \times \frac{OD^2 - ID^2}{4} \times Width \times Thickness \times Density \]

Outer Diameter (OD):

meters

Inner Diameter (ID):

meters

Width:

meters

Thickness:

meters

Density:

kg/m³

Steel Coil Weight (kg):

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1. What is a Steel Coil Weight Calculator?

Definition: This calculator estimates the weight of a steel coil based on its physical dimensions and material density.

Purpose: It helps metal manufacturers, suppliers, and engineers determine the weight of steel coils for transportation, storage, and material planning.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ Weight = \pi \times \frac{OD^2 - ID^2}{4} \times Width \times Thickness \times Density \]

Where:

\( Weight \) — Total weight of the steel coil (kg)
\( OD \) — Outer diameter of the coil (meters)
\( ID \) — Inner diameter (core diameter) of the coil (meters)
\( Width \) — Width of the steel strip (meters)
\( Thickness \) — Thickness of the steel (meters)
\( Density \) — Density of steel (typically 7850 kg/m³)

Explanation: The formula calculates the annular area between OD and ID, then multiplies by width and thickness to get volume, and finally by density to get weight.

3. Importance of Steel Coil Weight Calculation

Details: Accurate weight calculation is crucial for logistics planning, crane selection, storage requirements, and material cost estimation.

4. Using the Calculator

Tips: Enter all dimensions in meters. Default density is set to 7850 kg/m³ (standard for carbon steel). All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What if I don't know the inner diameter?
A: For solid steel (no inner hole), use ID = 0. For coils, measure the core diameter.

Q2: How accurate is this calculation?
A: It provides theoretical weight. Actual weight may vary slightly due to material composition and manufacturing tolerances.

Q3: What density should I use for stainless steel?
A: Use approximately 7930 kg/m³ for austenitic stainless steels like 304 or 316.

Q4: Can I calculate in pounds instead of kilograms?
A: Either enter density in lb/ft³ (490 for carbon steel) or convert the result (1 kg = 2.20462 lb).

Q5: Does this account for coating weight?
A: No, this calculates base metal weight only. Add coating weight separately if needed.