Nitrox Blend Calculator

Calculate Maximum Operating Depth (MOD), Equivalent Air Depth (EAD), best mix, and oxygen toxicity limits for Nitrox/EANx diving.

Oxygen fraction (%)

Planned depth (m)

ppO2 limit (bar)

Tab to move between fields

MOD (metres)

33.8

MOD (feet)111

EAD (metres)24.4

EAD (feet)80

ppO2 at depth1.28

Best mix for depth (%)35

CNS O2 limit (min)210

How to Use This Calculator

Enter the oxygen percentage of your Nitrox blend (e.g., 32% for EAN32 or 36% for EAN36).
Input your planned maximum depth in meters.
Set your ppO2 limit: 1.4 bar for bottom gas, 1.6 bar for decompression stops.
Read MOD (Maximum Operating Depth) in meters and feet — never dive deeper than this on the blend.
Check EAD (Equivalent Air Depth) to use air dive tables for decompression planning.
Review Best Mix for Depth to see the optimal O2 percentage for your planned depth at your ppO2 limit.

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