Surface Air Consumption (SAC) rate is the rate at which a diver consumes air/gas.
Photo by Henryhiggens, CC-BY 3.0
This calculator determines the SAC rate of a scuba diver based on his/her average dive depth, dive time, air consumed and the tank's volume and rated pressure. Determining SAC rate allows us to estimate how much amount of air the diver will consume diving to any depth with a cylinder of any size.