Are there any equations in identifying the magnetic flux density of a ferromagnetic magnet at a certain distance (for example, a neodymium magnet has a magnetic flux density of 5.31 miliTesla at
![Pull force / magnetic force Calculation between a disc magnet (NdFeB disc magnet, SmCo disc magnet, Alnico disc magnet, ferrite disc magnet) and an iron plate Pull force / magnetic force Calculation between a disc magnet (NdFeB disc magnet, SmCo disc magnet, Alnico disc magnet, ferrite disc magnet) and an iron plate](http://www.cy-magnetics.com/Diskplatte.png)
Pull force / magnetic force Calculation between a disc magnet (NdFeB disc magnet, SmCo disc magnet, Alnico disc magnet, ferrite disc magnet) and an iron plate
![Pull force / magnetic force calculation between two disc magnets (Neodymium disc magnet, Samarium disc magnet, Alnico disc magnet, ferrite disc magnet) Pull force / magnetic force calculation between two disc magnets (Neodymium disc magnet, Samarium disc magnet, Alnico disc magnet, ferrite disc magnet)](http://www.cy-magnetics.com/two-disk-Attraction.png)