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How much helium or other gas would be needed to lift a man 20cm of the floor?

April 26, 2017Engineering floor Gas helium lift man Mathematics needed

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How much helium or other gas would be needed to lift a man 20cm of the floor?

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Density of Helium gas 0.18 kg/m³ Density of Air 1.28 kg/m³ The difference is the lifting power of helium, so about 1 m³ will lift 1 kg so a 50 kg man would need 50 m³ of helium. 20cm number means nothing, once you started to rise, you keep going. .