Convert Elementary Charge to Franklin (e to Franklin)

Elementary Charge (e) and Franklin (Franklin) are both units of electric charge. With the conversion form below, you can effortlessly and accurately convert elementary charge to franklin. This free online calculator tool makes it simple and easy to perform the conversion from e unit to the Franklin unit.

Electric charge is a fundamental property of matter that causes it to experience electromagnetic force. Charge is measured in coulombs (C) in the SI system. It comes in two types—positive and negative—and is conserved: the total charge in an isolated system never changes. The elementary charge (the charge of a proton) is exactly 1.602176634 × 10⁻¹⁹ C. Charge is the source of electric fields and, when moving, of magnetic fields.

An elementary charge (symbol: e) is the fundamental unit of electric charge. It is defined as exactly 1.602176634 × 10⁻¹⁹ coulomb (C). Elementary charge represents the magnitude of the electric charge carried by a single proton or the magnitude of the negative charge carried by a single electron. The proton has a charge of +e, while the electron has a charge of −e.

As a fundamental physical constant, the elementary charge serves as the basis for measuring electric charge in atomic and subatomic systems. It plays a central role in electromagnetism, atomic physics, quantum mechanics, particle physics, and electrical engineering. Since the 2019 revision of the International System of Units (SI), the elementary charge has been assigned an exact numerical value, making it one of the defining constants of the SI.

Elementary charge is widely used to describe the charge of electrons, protons, ions, and other charged particles. It also provides the foundation for defining the coulomb, helping scientists relate microscopic electric charges to macroscopic electrical measurements used in laboratories, industry, and technology.

A franklin (symbol: Fr), also known as a statcoulomb (statC) or the electrostatic unit (esu) of electric charge, is a unit of electric charge used in the centimetre–gram–second (CGS) electrostatic system of units. Franklins were historically used in electrostatics and electromagnetic theory before the International System of Units (SI) became the worldwide standard. Today, the unit is primarily encountered in older scientific literature, textbooks, and historical references.

One franklin is approximately equal to 3.33564 × 10⁻¹⁰ coulomb (C). Unlike the SI coulomb, the franklin is defined within the CGS electrostatic system, where electric charge is derived from the electrostatic force between charged particles rather than from electric current.

Although the franklin is rarely used in modern engineering or scientific practice, it remains important for understanding historical publications, classical electromagnetism, and conversions between CGS and SI electrical units. Familiarity with the franklin helps researchers accurately interpret older electrical measurements and theoretical work.

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