Steel and Aluminum Weight Calculator

Find the weight of plate, bar, tube and angle in steel, stainless, aluminum and other metals, per foot and for your whole order.

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Pounds

Each piece
Per foot
Metric
Cross-section area
Volume
Cost

Cut List

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Part	Size	Qty	Lb.	Cost	Remove

How to Calculate Metal Weight

Weight is volume times density. Find the cross-section area, multiply by the length to get cubic inches, and multiply by the metal's density in pounds per cubic inch.

Weight (lb) = area (sq in) × length (in) × density (lb/in³)

Round: π d² ÷ 4 Hex: 0.866 × across-flats² Tube: π (OD² − ID²) ÷ 4 Angle: t (a + b − t)

Worked Example

Densities Used

Material	Lb. per Cu. In.	Lb. per Cu. Ft.	g/cm³

Nominal handbook densities. Alloys vary slightly; aluminum 6061 is shown, and 7075 is about 3% heavier.

Tips

Angles and tubes here have sharp corners, so they read slightly heavier than rolled or formed shapes with rounded corners (up to about 5% for thin tube). Structural shapes like W-beams and channels are sold by weight per foot; use the steel manual's number for those. Sheet gauges differ between steel, galvanized and aluminum, so enter the actual thickness in inches.