Abstract: Method and apparatus suitable for the retail sale of gasoline (as well as for other fluid delivery systems) in terms of standard quantities (e.g., gallons) at a standard temperature, such as 60.degree. F. The apparatus for retail gasoline sale provides a pressure differential for moving the gasoline from a storage tank to a hose, and it includes a metering device preferably having a rotating shaft and a shaft-angle encoder for generating a positive angle continuous, electrical signal as a function of the shaft angle output. The instantaneous temperature of the gasoline in the nozzle is sensed and a thermal value signal generated from it several times per second. A rapid electronic computer computes from the continuous gallonage signal and the thermal value signal, at intervals of several times per second, the gallonage corrected to standard gallons at 60.degree. F. and actuates a display of the computed dispensed gallons in terms of standard gallons at 60.degree. F.