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1. Einstein relation (Electrical mobility equation)

μ	Electrical mobility (m²/V*s)
q	The electrical charge of the particle (coulomb)
k_B	Boltzmann constant
T	The gas temperature (K)
D	The diffusion coefficient (m²/s)

μqTD

2. Stokes-Einstein equation

D	Diffusion coefficient (m²/s)
k_B	Boltzmann constant
T	The temperature (K)
π	pi
n	The dynamic viscosity (Pa*s)
r	The radius of the spherical practicle (m)

DTnr

fx​Solver is a solver for engineering and scientific equations.