Everything I can find says that a cubic foot of air can lift about 62-63 lbs.
1 cubic foot of air will support 62 lbs
2 cubic feet
steel
1000
The weight that 1 cubic foot of air can support depends on the density of the air. At sea level and room temperature, 1 cubic foot of air can support approximately 0.08 pounds. However, this value can vary based on factors such as altitude and temperature.
One cubic foot is 28.32L
One cubic foot of air can float approximately 0.0807 pounds (or about 36.5 grams) of weight due to its buoyancy in a denser medium, like water. This is based on the average density of air at sea level, which is about 0.0807 pounds per cubic foot. In practical terms, this means that if you have a balloon filled with air that displaces one cubic foot, it can lift that amount of weight.
The weight of a cubic foot (cf) varies depending on the material. For example, a cubic foot of water weighs about 62.4 pounds. However, a cubic foot of air has a negligible weight.
One cubic foot of air at sea level weighs approximately 0.08 pounds. Therefore, in one CFM (cubic foot per minute) of air, there would be approximately 0.08 pounds of air.
.018btu/ft3 F -- It takes .018btu to raise one cubic foot of air 1 degree Fahrenheit.
According to the related link, PHYSLINK.COM, "1 cubic foot of air at standard temperature and pressure assuming average composition weighs approximately 0.0807 lbs". The weight of air is highly dependant on the air temperature and barometric pressure.
9.54