Best Nitrox Mix for 40 meters
At 40 meters (5.0 bar absolute), the optimal Nitrox mix is EAN27. This blend gives you the maximum oxygen content while staying within safe PPO₂ limits of 1.4 bar, maximizing your bottom time by reducing nitrogen absorption compared to breathing air.
What does 'best mix' mean?
The best nitrox mix is the blend that maximizes your bottom time at a specific depth. However, the actual best choice depends on factors like your specific dive profile, gas availability, and personal preference. Always consult a certified Nitrox instructor.
Optimal Mix
EAN27 (27%)
Bottom Time
15 min
+36% than air
MOD (PpO2 1.4)
41.9 mt
MOD (PpO2 1.6)
49.3 mt
EAD
44.1 mt
Compare all mixtures
Use the interactive nitrox computer to compare NDL, MOD, and bottom times across all gas mixtures
Safety PpO2
| Depth | Best Mix | Bottom Time | MOD | EAD | |
|---|---|---|---|---|---|
| 18 meters | EAN40 (40%) | 214 min+240% than air | 25.0 m | 26.9 m | |
| 19 meters | EAN40 (40%) | 163 min+181% than air | 25.0 m | 28.2 m | |
| 20 meters | EAN40 (40%) | 145 min+174% than air | 25.0 m | 29.5 m | |
| 21 meters | EAN40 (40%) | 127 min+165% than air | 25.0 m | 30.8 m | |
| 22 meters | EAN40 (40%) | 109 min+142% than air | 25.0 m | 32.1 m | |
| 23 meters | EAN40 (40%) | 92 min+119% than air | 25.0 m | 33.4 m | |
| 24 meters | EAN40 (40%) | 84 min+115% than air | 25.0 m | 34.8 m | |
| 25 meters | EAN40 (40%) | 77 min+108% than air | 25.0 m | 36.1 m | |
| 26 meters | EAN38 (38%) | 61 min+74% than air | 26.8 m | 35.9 m | |
| 27 meters | EAN37 (37%) | 55 min+67% than air | 27.8 m | 36.4 m | |
| 28 meters | EAN36 (36%) | 49 min+58% than air | 28.9 m | 36.9 m | |
| 29 meters | EAN35 (35%) | 45 min+61% than air | 30.0 m | 37.4 m | |
| 30 meters | EAN35 (35%) | 42 min+68% than air | 30.0 m | 38.6 m | |
| 31 meters | EAN34 (34%) | 38 min+65% than air | 31.2 m | 39.1 m | |
| 32 meters | EAN33 (33%) | 36 min+64% than air | 32.4 m | 39.5 m | |
| 33 meters | EAN32 (32%) | 33 min+65% than air | 33.8 m | 40.0 m | |
| 34 meters | EAN31 (31%) | 29 min+61% than air | 35.2 m | 40.4 m | |
| 35 meters | EAN31 (31%) | 27 min+59% than air | 35.2 m | 41.5 m | |
| 36 meters | EAN30 (30%) | 24 min+60% than air | 36.7 m | 41.9 m | |
| 37 meters | EAN29 (29%) | 21 min+50% than air | 38.3 m | 42.3 m | |
| 38 meters | EAN29 (29%) | 20 min+54% than air | 38.3 m | 43.4 m | |
| 39 meters | EAN28 (28%) | 17 min+42% than air | 40.0 m | 43.8 m | |
| 40 meters | EAN27 (27%) | 15 min+36% than air | 41.9 m | 44.1 m |
This tool is intended to be used as an informational and educational tool
Always check the safety regulations and follow the standards relating to diving with enriched mixtures. Consult a certified Nitrox diver instructor for proper training.
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