What is the SI Unit of Energy?

Joule (J) is the SI unit of energy

The joule (J) is the standard unit of energy in the International System of Units (SI). It is named after the English physicist James Prescott Joule, who made important contributions to the study of energy. The joule is defined as the amount of work done when a force of one Newton acts over a distance of one meter.

Mathematically, the relationship between energy (E), work (W), force (F), and distance (d) is given by:

E = W = F ⋅ d

In terms of the SI base units, one joule is equivalent to one-kilogram meter squared per second squared (J = kg·m²/s²). It is important to note that the joule is a versatile unit that is used to measure various forms of energy, including mechanical, thermal, electrical, and more.

The joule provides a consistent and standardized way to quantify and express energy in scientific and engineering contexts. It allows for meaningful comparisons and calculations, facilitating the understanding and analysis of energy-related phenomena across different fields of study, such as physics, chemistry, and engineering.