The amount of magnetism [brmax at the center] of a magnet is measured in Gauss. This is a measure of the penetration of a magnet. Below is a table of the Gauss ratings of the most popular neodymium magnets:

Grade Gauss

N35 11,700-12,100

N38 12,100-12,500

N40 12,600-12,900

N42 12,900-13,200

N45 13,500-13,800

N48 14,000-14,200

N50 14,300-14,500

N52 14,600-14,800