Calculate tube and profile weight

The formulas

Weight always follows the same three steps: cross-section × length × density.

round tube (hollow):     cross-section = π × wall thickness × (outer diameter − wall thickness)
rectangular box (hollow): cross-section = width×height − (width−2×wall)×(height−2×wall)
round bar (solid):        cross-section = π/4 × diameter²
flat bar (solid):         cross-section = width × height

weight (kg) = cross-section (m²) × length (m) × density (kg/m³)

For hollow profiles (tube/box section) only the wall counts, not the hole inside — that's why the wall thickness appears twice (on all four sides for a box section).

Material densities

Standard values for the most common alloys — for a quote we use the exact material data.

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