Quick answers between dives.
15 calculators for the questions divers ask before and between dives: what a mix does at depth, when to turn, how much gas to keep, how much oxygen you have taken on. Free forever, on any account.
One question, one answer, every limit shown.
Every figure, status and limit comes from the same checks the planner applies to a plan, so the answer at the site matches the plan at home.
- Readout
- The figure that answers the question, large, with its unit.
- Rails
- Each figure against its limits: solid for a hard limit, dashed for an advisory.
- Verdict
- A sentence in words and a shape, never colour alone.
ppO₂
1.13bar
Breathable at 25 m, inside every limit.
- MOD
- 33mAt 1.4 bar ppO₂
- Density
- 4.61g/L
- EAD
- 20m
- END
- 25mO₂ counted as narcotic
The app's Mix at depth readout at a 1.4 bar ppO₂ limit, in salt water.
Gas
- Mix at depthWhat does this mix do at this depth?
- Max depth for a mixHow deep can this mix go, and what stops it?
- Best mixWhat should I breathe at this depth?
- Gas switchIs this switch safe from counterdiffusion?
Decompression
- No-deco limitHow long can I stay without a mandatory stop?
- Surface intervalWhat does my last dive leave for the next one?
Blending
- Partial-pressure fillHow do I fill this cylinder to the mix I want?
- Fill costWhat will this fill cost?
Consumption
- RMV from a diveHow much gas do I really breathe?
- Gas neededWill my cylinder last this dive?
- Turn pressureAt what pressure do I turn the dive?
- Minimum gasHow much must I keep to get two of us up?
Oxygen
- CNS and OTUHow much oxygen exposure is this?
- Oxygen time limitHow long can I stay at this ppO₂?
CCR
- Diluent checkWhat does my diluent do at depth and on the surface?