Calculate pull force, flux density, and hold weight for NdFeB permanent magnets on a steel plate
Pull force is negligible
The calculated pull force is less than 0.01 N. The magnet is too small or the air gap is too large for any practical holding force.
Very small magnet — handle with care
Magnets smaller than ~5 mm² pole area are fragile and difficult to handle. Consider using a slightly larger magnet for manufacturability.
Created by Catlynn Nguyen & Jie Chai · 2026