What is a good SAC rate?

Relaxed, experienced divers commonly log surface consumption around 12–18 L/min (roughly 0.4–0.6 cu ft/min); working hard or new divers run well above that. The trend matters more than the number — SAC falling across a season is the fitness-and-relaxation metric no one can fake. Our air-consumption guide covers how to measure it with any SPG.