SAC rate estimator

Estimates your surface air consumption (SAC) rate from a completed dive, so you can plan gas for future dives.

• Enter average depth, bottom time, start/end pressure and cylinder size.
• The tool converts the bar used to litres, then back to a surface rate.
• Use the result as your SAC in the dive planner's gas calc.

Use an average depth that reflects the whole dive (not just the max). Lower is more efficient — typical recreational SAC is 12–20 L/min.