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What is the density of air?

The density of dry air is 1.29 grams per liter (.07967 pounds per cubic foot) at 32° Fahrenheit (0° Celsius), average sea level, and average barometric pressure (29.92 in of mercury [760 millimeters]).

The weight of 1 cubic foot of dry air at 1 atmosphere of barometric pressure is:

Temperature (Fahrenheit)	Weight per cubic foot (pounds)
50°	0.07788
60°	0.07640
70°	0.07495

Sources: Kidder, Frank. Architects' and Builders' Handbook, p. 1569; Lewis, Richard J., Sr. Hawley's Condensed Chemical Dictionary, 12th ed., p. 28.

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