Apply Newton's second law F = m × a — enter mass and acceleration to find force, or solve for mass or acceleration. Choose your own units for each value.
Newton's second law states that the force on an object equals its mass times its acceleration: F = m a. It is the foundation of classical mechanics, linking the cause (force) to the effect (acceleration).
Enter any two of force, mass and acceleration and the calculator finds the third. Force is in newtons (N), where 1 N accelerates 1 kg at 1 m/s².
It states that force equals mass times acceleration, F = ma. The acceleration of an object is proportional to the net force and inversely proportional to its mass.
Rearrange to a = F/m. Set 'Solve for' to Acceleration, enter the force and mass, and the calculator returns the acceleration.
One newton (N) is the force that accelerates a 1 kg mass at 1 m/s². It equals 1 kg·m/s².
Mass is the amount of matter (kg) and is constant. Weight is the gravitational force on that mass, W = mg, and changes with gravity — you weigh less on the Moon.