Quantization of charge is a property of electric charge that states that the charge can take up only particular discrete values and can be an integral multiple of a basic unit charge "e". The magnitude of "e" is 1.602192 × 10−19 Coulombs. This means that any charged particle can have a charge equal to some integral number of "e", i.e., Q = ne, where "n" is any integer, positive or negative. The quantization of electric charge is related to the conservation of charges, which states that in nature, the total charge of an isolated system is always conserved.

The concept of quantization of charge was first suggested by the experimental laws of electrolysis by Faraday. The fact that the electric charge is always an integral multiple of "e" is termed as quantization of charge. This property is related to the transfer of electrons from one material to another, which generates an electromagnetic force and is the core concept of learning Coulombs law and studying various other properties like electric field lines and understanding the conduction of electricity.