Does spring balance measure weight or mass?

The spring balance weighs an object by working against the gravitational pull with the force of the expanded spring. A basic scale with a spring connected at one end is called a spring balance. The spring has a hook at the other end that can hold the thing. Hooke's Law is the foundation of how the spring balance operates. The distance the string is stretched from the mean position directly proportionately affects the force needed to expand the spring, according the law. So, a spring balance is used to measure weight.