Does your weight change in elevator? I have recently found an answer to this question but I can't understand it completely. So, here is the answer : No, your weight is unchanged. To provide the acceleration upwards, the floor or scale must exert on your feet an upward force that is greater in magnitude than your weight. It is this greater force that you fell, which you interpret as feeling heavier. The scale reads this upward force, not your weight, and so its reading increases. I can't understand how the force exerted by the floor on one's feet acts on the scale.