Calculating Magnetic field dimensions

[dwaring28720]

simple question which probably has a complex answer, if given the dimensions and composition or a permanent magnet ie if the magnet is a cube 10mm x 10mm N35 Neodymium where would one find the equation to calculate the range at which the magnet extended

[Bob S]

Here is an online field calculator for both round and rectangular magnets.
http://www.arnoldmagnetics.com/Content1.aspx?id=4621

There are others on the web. I don't know of where to find the equations.

Bob S

[dwaring28720]

works perfectly for my purposes thanks alot

[MagnetDave]

Just a freebie, since you mentioned my employer. Arnold also has an app for that. If you're on an iPhone, you can go to the App Store and get a free iPhone app that does that, too.