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Does atmospheric pressure affect weight measurement?

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Let's check it out together. Object: Imagine there is body which is standing at basic posture. Hands down and are adjacent to whole body (stash away all extremities). Thus, effect of buoyancy force might be minimized. read more

Later: Air density if affected by air pressure as well as temperature and humidity, so atmospheric pressure (which you asked about) affects weight measurements, but not directly. It’s through the effect pressure has on density of air. read more

For the uncertainties in the measurement of air temperature, pressure and humidity to have a negligible effect on the buoyancy of pressure balance weights - and assuming that state-of-the-art uncertainties are required of the pressure balance - their combined effect should correspond to, say, an uncertainty of no more than about 1 part per million (k = 2) of the mass, and hence force, values. read more

There is pressure above you pushing down and trying to increase your weight, but there is just as much pressure below you pushing up trying to decrease your weight. So they ALMOST balance out. But, there's actually slightly more air pressure below you than above you, so the overall total effect is that your weight actually gets decreased. read more

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