Nitrox MOD calculator
Change one of the three values: the other two are recalculated. The field marked with the lock is the one currently calculated.
MOD
33.8 m
Equivalent air depth (EAD)
27.7 m
Formula: MOD = (max PpO₂ / FO₂ − 1) × 10 metres. Results are indicative: always plan your dives according to your training and your dive computer's tables.
Log every dive with DiveLog
Import dives straight from your dive computer and DiveLog stores your gas mixes, tank pressures and profiles automatically.
Frequently asked questions
What is MOD in scuba diving?
MOD (maximum operating depth) is the deepest you can breathe a given gas before oxygen partial pressure exceeds your chosen limit, normally 1.4 bar for the bottom phase and 1.6 bar for decompression.
How do you calculate nitrox MOD?
MOD = (max PpO2 / FO2 − 1) × 10 metres, where FO2 is the oxygen fraction. For EAN32 at 1.4 bar that gives (1.4 / 0.32 − 1) × 10 = 33.7 m.
What is the MOD of EAN32 and EAN36?
At 1.4 bar PpO2 the MOD is about 33.7 m for EAN32 and about 28.9 m for EAN36. At 1.6 bar they become roughly 40 m and 34.4 m.
What is equivalent air depth (EAD)?
EAD is the depth at which air would give the same nitrogen partial pressure as your nitrox mix, so you can use air tables or compare nitrogen loading.