Why does shifting one’s weight on a scale change the readout?

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This is regarding a digital bathroom scale; idk if it happens on analog ones, too. I’ve noticed that shifting my weight to one foot, to the balls of my feet vs my heels, etc. changes the weight readout–sometimes up to two pounds’ difference! So I’m curious to know why changing the weight distribution even a tiny bit affects the readout so drastically, when the same amount of weight is still on the scale.

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8 Answers

Anonymous 0 Comments

Torque.

It’s possible to temporarily convert some of your downward force (weight) into lateral force on the pressure sensors. These sensors are designed to measure force along one axis only, and so slightly off axis pressure (tilting the scale) will cause your weight to read as lower than it is.

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