Maximum O2 Level Calculator
* Special thanks to Boomer from
for his help.
This calculator estimates the maximum equilibrium concentration of oxygen (O2) in aquarium water. The local atmospheric pressure must be known so that the oxygen concentration in the atmosphere can be estimated. If you don't know this, enter your local altitude instead.
Atmospheric Pressure or Altitude:
Millimeters of Mercury (torr)
Inches of Mercury (inHg)
Altitude in Feet (ft)
Altitude in Meters (m)
Relative Specific Gravity (sg)
Maximum O2 Level:
This calculator estimates the
concentration of O2, which can differ quite markedly from the
O2 concentration in your aquarium.
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