Best Nitrox Mix for 21 meters
At 21 meters (3.1 bar absolute), the optimal Nitrox mix is EAN40. This blend gives you the maximum oxygen content while staying within safe PPOâ‚‚ 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.
Best mix for 21 m is EAN40
Free lookup, no account needed. Depthlog keeps the real dive: the mix, the depth and the bottom time.
Optimal Mix
EAN40 (40%)
Bottom Time
127 min
+165% than air
MOD (PpO2 1.4)
25.0 mt
MOD (PpO2 1.6)
30.0 mt
EAD
13.5 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 | 11.3 m | |
| 19 meters | EAN40 (40%) | 163 min+181% than air | 25.0 m | 12.0 m | |
| 20 meters | EAN40 (40%) | 145 min+174% than air | 25.0 m | 12.8 m | |
| 21 meters | EAN40 (40%) | 127 min+165% than air | 25.0 m | 13.5 m | |
| 22 meters | EAN40 (40%) | 109 min+142% than air | 25.0 m | 14.3 m | |
| 23 meters | EAN40 (40%) | 92 min+119% than air | 25.0 m | 15.1 m | |
| 24 meters | EAN40 (40%) | 85 min+118% than air | 25.0 m | 15.8 m | |
| 25 meters | EAN40 (40%) | 77 min+108% than air | 25.0 m | 16.6 m | |
| 26 meters | EAN38 (38%) | 62 min+77% than air | 26.8 m | 18.3 m | |
| 27 meters | EAN37 (37%) | 56 min+70% than air | 27.8 m | 19.5 m | |
| 28 meters | EAN36 (36%) | 50 min+61% than air | 28.9 m | 20.8 m | |
| 29 meters | EAN35 (35%) | 45 min+61% than air | 30.0 m | 22.1 m | |
| 30 meters | EAN35 (35%) | 43 min+72% than air | 30.0 m | 22.9 m | |
| 31 meters | EAN34 (34%) | 39 min+63% than air | 31.2 m | 24.3 m | |
| 32 meters | EAN33 (33%) | 36 min+64% than air | 32.4 m | 25.6 m | |
| 33 meters | EAN32 (32%) | 33 min+65% than air | 33.8 m | 27.0 m | |
| 34 meters | EAN31 (31%) | 30 min+58% than air | 35.2 m | 28.4 m | |
| 35 meters | EAN31 (31%) | 27 min+59% than air | 35.2 m | 29.3 m | |
| 36 meters | EAN30 (30%) | 24 min+60% than air | 36.7 m | 30.8 m | |
| 37 meters | EAN29 (29%) | 22 min+57% than air | 38.3 m | 32.2 m | |
| 38 meters | EAN29 (29%) | 20 min+54% than air | 38.3 m | 33.1 m | |
| 39 meters | EAN28 (28%) | 18 min+50% than air | 40.0 m | 34.7 m | |
| 40 meters | EAN27 (27%) | 15 min+25% than air | 41.9 m | 36.2 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 repetitive diving. Consult a certified diving instructor for proper training. Read the dive safety disclaimer and the Terms of Service.
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