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Updated February 2026
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Air Consumption Calculator
Plan your UK dives with accurate gas management
Your SAC Rate
Surface Air Consumption (litres/min)
L/min
Excellent
12 L/min
Good
15 L/min
Average
18 L/min
New Diver
22 L/min
Tank Size
Common UK cylinder sizes
10L Steel
Compact, shore diving
12L Steel
UK standard
15L Steel
Extended bottom time
Twin 12L
Technical / deep
Fill Pressure
Starting pressure
bar
Reserve
Safety margin
bar
Planned Depth
Maximum depth for this dive
metres
Dive Type
Affects exertion and gas consumption
Relaxed Reef
Easy swimming, good vis
Wreck Dive
Some penetration, current
Deep Dive
30m+, increased narcosis
Drift Dive
Minimal swimming
Calculate My Air Time