Gas consumption planner
Estimate the gas needed for your planned dive and check if your tank is sufficient, taking the reserve into account.
Gas needed
2205 L
Pressure needed
183.8 bar
Usable gas
150 bar
Max time at this depth
28.6 min
Turn pressure (1/3)
150 bar
Outcome
Not enough gas
Formula: gas = RMV × (depth/10 + 1) × time. The calculation does not include ascent, safety stops or decompression: always plan according to your training.
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Frequently asked questions
How much air do I need for a dive?
Gas required (litres) = RMV × (depth / 10 + 1) × bottom time. Divide by cylinder volume to get the pressure in bar, then add your reserve.
What is a rule of thirds turn pressure?
With the rule of thirds you use one third of your usable gas on the way out, one third to come back and keep one third in reserve. The planner shows the turn pressure for your fill and reserve.
What reserve pressure should I keep?
Recreational divers commonly surface with 50 bar. Overhead or decompression dives need a planned reserve able to bring two divers to the surface.
Which depth should I use for gas planning?
Use the average depth you expect for the bottom phase. Using maximum depth is more conservative and is a sensible safety margin for square profiles.