V_DF

When an ion is not at its electrochemical equilibrium, an electrochemical driving force (V_DF) acts on the ion, causing the net movement of the ion across the membrane down its own electrochemical gradient.

The electrochemical driving force is generally expressed in millivolts and is calculated according the following equation:

V_DF = V_m − V_eq

where V_DF is the electrochemical driving force, V_m is the membrane potential, and V_eq is the equilibrium potential.

Membrane potential
Equilibrium potential
Electrochemical gradient

Resting Membrane Potential - Electrochemical Driving Force Acting on Ions
Electrochemical Driving Force Calculator

Refers to the balance of chemical and electrical gradients that act on an ion, particularly as it relates to the movement of an ion across a biological membrane (see Resting Membrane Potential - Establishment of the Membrane Potential and Resting Membrane Potential - Nernst Equilibrium Potential).

Chemical gradient
Electrical gradient

Electrochemical gradient

Electrochemical gradient

Electrochemical gradient

Electrochemical gradient