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Metal Weight Calculator Online | Steel, Aluminum & Stainless Steel Sheet/Plate Calculator

Free online calculator for steel, aluminum and stainless steel weights. Calculate sheet/plate weight in kg/lbs with metric/imperial units. Instant volume and weight results for engineering projects.

This metal weight calculator helps engineers, fabricators, and construction professionals quickly determine the weight and volume of three common metal materials:

  • Carbon Steel (7850 kg/m³ density)
  • Aluminum (2700 kg/m³ density)
  • Stainless Steel (7900 kg/m³ density)

The tool supports both metric (mm, kg) and imperial (inches, lbs) unit systems, with separate calculators for each material type to ensure accurate results.

Steel Weight Calculator

(mm) (mm) (mm)

Total Volume: (m³)

Total Weight: (kg)

Aluminum Weight Calculator

(mm) (mm) (mm)

Total Volume: (m³)

Total Weight: (kg)

Stainless Steel Weight Calculator

(mm) (mm) (mm)

Total Volume: (m³)

Total Weight: (kg)

Key Features

✔ Three Material-Specific Calculators in One Interface
✔ Dual Unit System (Metric/Imperial) with Automatic Conversion
✔ Simultaneous Volume and Weight Calculation
✔ Quantity Multiplier for Batch Calculations
✔ Responsive Design Works on All Devices
✔ Color-Coded for Easy Material Identification

How to Use

  1. Select your material calculator (Steel, Aluminum, or Stainless Steel)
  2. Choose your preferred unit system (metric or imperial)
  3. Enter dimensions:
    • Length (plate/sheet length)
    • Width (plate/sheet width)
    • Thickness (material thickness)
  4. (Optional) Enter quantity for multiple pieces
  5. Click “Calculate” to get instant results
  6. View both volume and weight in selected units
  7. Use “Clear” to reset any calculator

Weight Calculation Formula

Weight = Volume × Density

Volume Calculation:

For metric units:

Volume (m³) = (Length(mm) × Width(mm) × Thickness(mm)) ÷ 10⁹ × Quantity

For imperial units:

Volume (in³) = Length(in) × Width(in) × Thickness(in) × Quantity

Standard Density Values:

  • Carbon Steel: 7850 kg/m³ (0.284 lb/in³)
  • Aluminum: 2700 kg/m³ (0.098 lb/in³)
  • Stainless Steel: 7900 kg/m³ (0.286 lb/in³)

Note: 1 inch = 25.4 mm, 1 pound = 0.453592 kg

FAQ

Q1: What thickness range does this calculator support?
A: The calculator works with any positive thickness value, though typical sheet metal ranges are 0.5mm-50mm (0.02″-2″).

Q2: Why are there separate calculators for each metal?
A: Different metals have different densities. Separate calculators prevent accidental use of wrong density values.

Q3: How accurate are the calculations?
A: Calculations are theoretically precise for given dimensions. Actual weights may vary ±2% due to alloy composition and manufacturing tolerances.

Q4: Can I calculate irregular shapes?
A: This calculator is for rectangular plates/sheets only. For other shapes, calculate the equivalent rectangular volume.

Q5: Does this include material wastage?
A: No, this calculates net material weight. Add 5-10% for typical cutting wastage.

Q6: Why does stainless steel show different grades?
A: We use 7900 kg/m³ for general 304 stainless. For exact grades (316, etc.), use their specific densities.

Q7: How do I calculate pipe/tube weight?
A: This is for flat sheets only. Use our pipe weight calculator for tubular forms.

Q8: Can I save my calculations?
A: Currently no save function, but you can screenshot results or note them down.

Q9: What’s the maximum size I can calculate?
A: No technical limit, but extremely large values may show scientific notation.

Q10: How do I calculate weight for multiple thicknesses?
A: Calculate each thickness separately and sum the results.

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