pCO2 Calculator
ExplicitfreeCO2 dissolved concentration/Henry solubility coefficient pressureatm, pCO2NOT total inorganic carbon or globalpHconversion; temperature/salinity/coefficient external.
Description
Dissolved free carbon dioxide and its equilibrium partial pressure are linked by a matched Henry solubility coefficient.
Dissolved free carbon dioxide and its equilibrium partial pressure are linked by a matched Henry solubility coefficient.1
This tool calculates partial pressure from supplied free CO2 concentration without converting total inorganic carbon or pH.
When to use pCO2 Calculator
Use this tool to calculate partial pressure from supplied free CO2 concentration without converting total inorganic carbon or pH.
How to use pCO2 Calculator and how it works
- Establish the observations, units, reference context and assumptions described below.
- Enter actualMeasuredDissolvedFreeCo2MolPerLiter, callerMatchedHenryCoefficientMolPerLiterAtmosphere and run the tool.
- Read result.value using the meanings and sign conventions below.
- Correct any rejected inputs and rerun; independently review the result under the stated scope.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| actualMeasuredDissolvedFreeCo2MolPerLiter | Nonnegative measured dissolved free CO2 concentration in mol/L; not total inorganic carbon. | number | Required; finite; nonnegative; branch conditions below |
| callerMatchedHenryCoefficientMolPerLiterAtmosphere | Positive matched Henry solubility coefficient in mol/(L·atm), for the intended temperature and salinity. | number | Required; finite; strictly positive; branch conditions below |
Supply nonnegative measured dissolved free CO2 in moles per liter and positive independently matched Henry solubility coefficient in moles per liter-atmosphere. Divide concentration by coefficient and return atmospheres. The coefficient must match temperature, salinity and convention; total inorganic carbon cannot be substituted for free CO2.
partialPressureAtmospheres=freeCo2MolPerLiter/henryMolPerLiterAtmosphere Use the stated ordering, units and branch conditions.
| Output field | Meaning | Value type |
|---|---|---|
| result | Object containing the fields below. | object |
| result.value | Conditional free-CO2 partial pressure in atmospheres. | number |
{
"input": {
"actualMeasuredDissolvedFreeCo2MolPerLiter": 4,
"callerMatchedHenryCoefficientMolPerLiterAtmosphere": 2
},
"output": {
"result": {
"value": 2
}
}
}Limitations and assumptions
The calculation depends on independently established observations, coefficients and the matching units. It does not collect data, choose a treatment or target, establish model applicability or provide a validated forecast. Interpret its result within the branch conditions and assumptions above.
Supply explicit values and dense aligned arrays. Unexpected fields, wrong types and nonfinite scalar values are rejected; fixed-token, alignment and other branch conditions are explained above. A successful false flag, empty match list or unknown-evidence list differs from an input error. Extremely large inputs or nonrepresentable results may fail.
Alternative or Complementary methods
Use Oxygen Supersaturation Calculator for a related operation: Oxygen saturation is a comparison with equilibrium concentration under specified temperature, salinity and pressure.
Use Bicarbonate Requirement Calculator for a related operation: Bicarbonate requirements depend on the water's chemistry, product and independently qualified buffering context.
References
-
pCO2 Calculator — tool.io
Similar or alternative tools
- Oxygen Supersaturation Calculator
Oxygen saturation is a comparison with equilibrium concentration under specified temperature, salinity and pressure.
- Bicarbonate Requirement Calculator
Bicarbonate requirements depend on the water's chemistry, product and independently qualified buffering context.