Torsion calculations of solid square section under twisting moment can be
done with the following calculator. The calculator is only
valid for solid square shafts (sections).
Torsion of Square Tube Calculator:
Note: Use dot "." as decimal separator.
RESULTS 
Parameter 
Value 
Maximum shear stress [τ_{max}]* 



Angle of twist [θ] 



Torsional stiffness constant [K] 



Note: *Maximum shear stress is at the midpoint of each longer side for a≥b.