Square tube weight calculator (kg/m)
Enter the dimensions in mm to get the weight per metre and the total weight for any length and number of pieces, in steel, stainless steel or aluminium.
Weight per metre
11.734 kg/m
Total weight
70.4 kg
Density: 7.85 kg/dm³
Steel square and rectangular tubes use the EN 10219 corner radii, the same as our size tables.
Formula and example
Cross-section area A = 4t (a − t) (mm). Weight per metre = A × density ÷ 1000, with the density in kg/dm³.
4t (a − t)
Example: 40 × 40 × 2 mm in steel weighs 2.31 kg/m, so a 6 m length weighs 13.83 kg.
Carbon steel 7.85 kg/dm³, stainless steel (AISI 304) 7.93 kg/dm³, aluminium 2.70 kg/dm³. Delivered weights can differ from calculated ones within the mass tolerance of the product standard.
Other weight calculators
- Rectangular tube weight calculator (kg/m)
- Round tube / pipe weight calculator (kg/m)
- Flat bar weight calculator (kg/m)
- Round bar weight calculator (kg/m)
- Square bar weight calculator (kg/m)
- Hexagon bar weight calculator (kg/m)
- Angle weight calculator (kg/m)
- Sheet / plate weight calculator (kg/m²)
- Steel beam weight calculator (kg/m)