In physics, moment of force (often just moment) is a measure of a force's tendency to cause a body to rotate about a specific point or axis.

In this concept the moment arm, the distance from the axis of rotation, plays an important role. The lever, pulley, gear, and most other simple machines create mechanical advantage by changing the moment arm. The SI unit for moment is the newton meter (kgm²/s² or Nm).

Formula for moment: