How do you calculate surface area of a human lung?

The surface area of a human lung can be estimated using the formula for the total surface area of the alveoli, which are the tiny air sacs where gas exchange occurs. The average surface area is approximately 70 square meters for an adult human lung. This is often derived from studies involving lung imaging and mathematical modeling of the alveolar structure, taking into account factors like the number and size of alveoli. For precise calculations in a clinical or research setting, advanced imaging techniques like CT scans may be used.