Mass is a force and is measured in newtons ($N$), while weight is the amount of matter and is measured in kilograms ($kg$).

Weight is a scalar quantity that remains constant everywhere, while mass is a vector quantity that depends on the local gravitational field.

Mass is an intrinsic property representing the amount of matter in an object, while weight is the gravitational force exerted on that mass by a gravitational field.

Both mass and weight are types of forces that only exist when an object is in contact with the ground.