Scuba Air Consumption Calculator
Calculate your surface air consumption (SAC) rate and estimate remaining bottom time at depth based on tank size and pressure readings.
Inputs
L
bar
bar
min
m
Results
SAC Rate
10.71 L/min
Consumption at Depth30 L/min
Bottom Time Remaining20 min
Rate Rating1
How to Use This Calculator
- Enter your tank volume in liters (e.g., 12 L for a standard single cylinder).
- Input the starting pressure in bar and ending pressure in bar from your dive computer or SPG.
- Enter the total dive duration in minutes.
- Set the average dive depth in meters for the Boyle's Law depth correction.
- Read your SAC Rate (Surface Air Consumption) in L/min — below 12 is excellent; 15–20 is typical for recreational divers.
- Use Remaining Bottom Time to plan your gas reserve when diving the same profile again.
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