Magnetic Field Strength Calculators

The calculators on this page are appropriate only for "Squre Loop", also known as "Straight Line", magnetic materials such as neodymium-iron-boron, ferrites and samarium cobalt magnets. They are not for use with alnico materials.

Field Strength of a Cylindrical Magnet

Z = Distance tested from magnet
L = Length of magnet
D = Diameter of magnet
Br = Residual Gauss of magnet

Z:
in.
L:
in.
D:
in.
Br:
gauss



B(z) = Gauss

Field Strength of a Rectangular Magnet

Z = Distance tested from magnet
L = Length of magnet
A = Height of magnet
B = Width of magnet
Br = Residual Gauss of magnet

Z:
in.
A:
in.
B:
in.
L:
in.
Br:
gauss



B(z) = Gauss