Electromagnet Pull Force
Estimate the lifting force of an electromagnet from the flux density at the pole faces, free online.
About this calculator
The attractive force across an air gap is F = Bยฒ A รท (2ฮผโ) per pole face. At B = 1 T the pull is about 40 N per cmยฒ (โ 4 kgf/cmยฒ). The force falls with the square of the flux density, so a small air gap greatly increases holding force.