The standard atmosphere (symbol: atm) is a unit of pressure equal to 101325 Pa ('pascals') or 1013.25 millibars or hectopascals. It is equivalent to 760 mmHg (torr), 14.696 psi. This tool converts atmospheres to pounds per square foot (atm to psf) and vice versa. 1 atmosphere = 2116.2166236739 pounds per square foot.