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Steel Weight Calculator

Calculate steel mass for plates, bars, pipes, tubes, angles and beams, with an optional manufacturer unit-weight override.

Created by:
Jamie C.
Jamie C.

Across her work, Jamie focuses on bridging operational precision with practical technology adoption. She develops industry-specific calculators, software guides, and technical content tailored to the construction, residential living, HVAC, and artificial intelligence sectors. By pairing hands-on systems design with advanced AI and automation workflows, her resources empower trade specialists, contractors, and growing teams to eliminate bottlenecks, forecast project requirements accurately, and run more efficient operations. Fluent in five languages, Jamie approaches every tool and article with an emphasis on clarity, actionable utility, and real-world results.

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Steel weight equals its volume times density. For a catalog section, use the manufacturer weight per length times length and piece count.

Structural Steel Unit Weight Formulas by Shape

Carbon steel has a standard density of 0.2836 lb/in³ (7.85 g/cm³ or 490 lb/ft³). Common shape formulas include:

  • Steel Plate / Sheet: Weight (lbs) = Length (in) × Width (in) × Thickness (in) × 0.2836. A 1/4″ steel plate weighs approximately 10.21 lbs per sq ft.
  • Round Bar: Weight (lbs) = π × (Diameter / 2)² × Length (in) × 0.2836.
  • Round Pipe / Tubing: Weight (lbs) = π × (OD - Wall Thickness) × Wall Thickness × Length (in) × 0.2836.
  • Other Alloys & Non-Ferrous Metals: If working with aluminum, brass, or stainless steel alloys, switch to our comprehensive Metal Weight Calculator.

Standard Weight of Structural Steel Beams and Tubes

Wide-flange I-beams and hollow structural sections (HSS) are specified by nominal weight per linear foot (for example, a W12×26 beam weighs 26.0 lbs per linear foot). Multiply the length in feet by the specified pound rating to obtain gross delivery weight.

Project worksheet

What does your steel section weigh?

Calculate steel mass for plates, bars, pipes, tubes, angles and beams, with an optional manufacturer unit-weight override.

Dimension units

Nominal default density is 7,850 kg/m³. Actual grades, tolerances and rolled fillets can change weight.

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Frequently asked questions

What questions come up about steel weight?

What is the unit weight of steel per cubic foot?

The standard unit weight of carbon steel is approximately 490 pounds per cubic foot (490 lbs/ft³) or 7,850 kilograms per cubic meter (7,850 kg/m³).

How do you calculate the weight of a steel plate?

Multiply length in inches by width in inches by thickness in inches, then multiply by 0.2836. For example, a 48" × 96" sheet of 1/2-inch plate weighs: 48 × 96 × 0.5 × 0.2836 = 653.4 pounds.

What is the difference between this tool and the metal weight calculator?

This tool focuses specifically on structural carbon steel shapes (I-beams, structural channels, angle iron, and rebar), whereas our Metal Weight Calculator provides comparative densities across 20+ non-ferrous and exotic alloys.

Sources

Which references support this estimate?

  1. SSAB, steel properties and density
  2. SSAB, hot-rolled steel plate environmental declaration
  3. NIST, circumference, area and volume
  4. NIST, unit conversion factors
Created by

Who created this steel weight calculator?

Jamie C.

Across her work, Jamie focuses on bridging operational precision with practical technology adoption. She develops industry-specific calculators, software guides, and technical content tailored to the construction, residential living, HVAC, and artificial intelligence sectors. By pairing hands-on systems design with advanced AI and automation workflows, her resources empower trade specialists, contractors, and growing teams to eliminate bottlenecks, forecast project requirements accurately, and run more efficient operations. Fluent in five languages, Jamie approaches every tool and article with an emphasis on clarity, actionable utility, and real-world results.

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