Electron Volt to Megajoule Converter

An electron volt (eV) is a unit of energy equal to approximately 1.602 × 10⁻¹⁹ joules. It represents the kinetic energy gained by an electron when accelerated through an electric potential difference of one volt.

The electron volt was introduced in the early 20th century with the development of atomic and nuclear physics. It provided a convenient energy scale for atomic and subatomic processes, where joules would result in extremely small numbers with many decimal places.

Electron volts are extensively used in atomic physics, nuclear physics, particle physics, and materials science. They're standard for measuring atomic binding energies, photon energies, particle accelerator energies, and electronic band gaps in semiconductors.

A megajoule (MJ) is a unit of energy equal to one million joules (10⁶ J). It represents moderate to large amounts of energy, commonly used for measuring food energy content, fuel values, and mechanical work in engineering applications.

The megajoule gained prominence with the development of energy-conscious engineering and nutrition science. It became particularly useful for expressing food energy content as an alternative to calories, and for measuring energy in automotive and mechanical engineering applications.

Megajoules are used in nutrition labeling (as an alternative to calories), automotive engineering, mechanical systems, and fuel energy content. They're found on food packaging in many countries, vehicle fuel efficiency ratings, and engineering calculations for mechanical work and heat transfer.