Find the net force from mass and acceleration, plus the weight on Earth.
Newton's second law links force, mass, and acceleration: the net force on an object equals its mass times its acceleration, F = ma. It explains why a given push produces a larger acceleration on a light object than on a heavy one, and it underpins almost all of classical mechanics.
Mass is the amount of matter in an object and stays the same everywhere. Weight is the gravitational force on that mass, W = mg, and changes with location. This calculator returns the net force for the acceleration you enter, plus the object's weight under Earth gravity (9.81 m/s²).
One newton is the force needed to accelerate a one-kilogram mass at one metre per second squared.
No. Mass is constant, while weight is the force of gravity on the mass and depends on the local gravitational field.