Gas Management
Nitrox Blending Calculator
Calculate ideal oxygen and air additions for an empty cylinder or a residual-gas top-up, with explicit impossible-fill results.
Blend inputs
Enter the analyzed residual gas and the desired fill. Pressure fields follow the independent pressure-unit preference.
Quick examples
Load a complete scenario, then adjust any value below.
Starting cylinder
bar
Allowed range: 0 to 350 bar.
%
Allowed range: 1 to 100 %.
At zero pressure, the starting analysis makes no contribution to the calculation.
Target fill
EAN32bar
Allowed range: 1 to 350 bar.
%
Allowed range: 21 to 100 %.
Ideal partial-pressure blend
Oxygenaddition
27.8 bar
Airaddition
172.2 bar
Predicted final mix
EAN32
Continuous-blending equivalent
- Added gas
- EAN32
- Oxygenfeed /Airfeed
- 1 : 6.18
- Oxygenshare of feed
- 13.92%
This is the ideal feed ratio, not a compressor setting. Use only within the oxygen limit and procedure specified for the actual blending system.
Displayed fill pressures are rounded to 0.1 bar; the engine keeps unrounded values. Ideal mixing ignores temperature, real-gas behavior, gauge error, and bank-pressure limits.
A calculation is not a fill procedure
Pure oxygen creates a serious fire hazard. Blending requires suitable training and oxygen-clean, oxygen-compatible equipment and procedures. After the gas has mixed and cooled, analyze it with a calibrated oxygen analyzer, label the cylinder, and plan the dive from the measured mix.