What unit is energy measured in?

Energy is measured in Joules (J), which is the standard unit of energy in the International System of Units (SI). A Joule is defined as the amount of energy transferred when a force of one newton is applied over a distance of one meter. This clear definition helps us understand that a Joule quantifies energy in a precise way, making it fundamental in physics and various applications involving energy conversion and calculations. While other measurements like calories and watts are also related to energy, they have specific contexts; calories are often used in nutrition and heat energy, and watts measure power, which is the rate of energy transfer rather than energy itself. This distinction underlines why Joules are the primary unit for measuring energy.