SAC Rate Calculator
Surface Air Consumption — how many litres of gas you breathe per minute at the surface. Compute it from a single dive's data to plan gas reserves and turn pressures for future dives.
Dive data
From your dive computer log. Not max depth.
Results
SAC rate (surface)
— L/min
This is the gas you'd breathe per minute at the surface — your baseline consumption.
RMV at average depth
— L/min
What you actually consumed at — m average.
Total gas used
— L (surface equivalent)
Typical recreational range: 12–25 L/min. Tech divers under task loading often hit 25–35 L/min. Use your worst dive for gas planning, not your best.