NitroxPro MOD · Best Mix · Max O₂
Confirm gas mix and depths before diving
Gas Mix
O₂ Fraction
%
⚠ Hypoxic mix — unsafe to breathe at surface
1%50%99%
Settings
Water
Units
O₂ Input
Results
Target Depth → Ideal O₂%

Enter your planned depth. Returns the highest O₂% that keeps PO₂ at or below 1.4 ata — the standard recreational limit.

Depth ft
10 ft 80 ft 150 ft
Best Mix —
Target Depth → Max Safe O₂%

Enter a depth and PO₂ limit. Returns the maximum O₂% you can use at that depth.

Depth ft
10 ft 80 ft 150 ft
PO₂ Limit
Max O₂% —
MOD = ((PO₂ ÷ FO₂) − 1) × depth factor  ·  Salt 10.0 msw/ata  ·  Fresh 10.3 mfw/ata  ·  1 m = 3.28084 ft
For planning reference only. Not a substitute for certified nitrox training. Always verify calculations independently and dive within your certification limits. The authors accept no liability for errors or diving incidents arising from use of this tool.