In SI units, work is measured in which unit?

Work is measured in joules (J) in the International System of Units (SI). A joule is defined as the amount of work done when a force of one newton is applied over a distance of one meter in the direction of the force. This unit captures both the concept of force, measured in newtons, and displacement, measured in meters, allowing for a clear representation of work as the product of these two factors.

In comparison with the other units provided: watts (W) measures power, which is the rate of doing work; calories (cal) are often used in dietary contexts but are not standard SI units for work; and newtons (N) describe force rather than work itself. Therefore, relying on the definition and relationships between these concepts, joules emerge as the appropriate unit for measuring work in SI.