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CHEMISTRY / STOICHIOMETRY

Combustion Oxygen Demand Calculator

Calculate ideal oxygen demand for complete combustion of CxHyOz fuel. Review the equation, substituted values, assumptions, and result in one guided chemistry workspace.

  • 01 Calculated in this tab
  • 02 Values stay in this browser tab
  • 03 Use boundary

Conversion input

Known value

Filter by unit name, symbol, or code. Your current selections remain available.

Equation inputs

Preparing the calculator...

Use boundary

Calculation path

Calculate ideal oxygen demand for complete combustion of CxHyOz fuel. The page evaluates the displayed equation from your supplied values and presents both symbolic and substituted KaTeX working so the arithmetic can be checked.

Calculation path

nu_O2=x+y/4-z/2; demand=nu_O2 M_O2/M_fuel

What you provide

What you provide

  • Carbon atom count x, using the same scenario as the other inputs
  • Hydrogen atom count y, using the same scenario as the other inputs
  • Fuel oxygen atom count z, using the same scenario as the other inputs
  • Fuel molar mass expressed in g/mol, using the same scenario as the other inputs

What you receive

What you receive

  • Oxygen demand in g O2/g fuel from the stated equation
  • A symbolic formula plus substituted working with your values
  • Visible assumptions, field guidance, and an authoritative learning reference

Use boundary

Choose the maximum decimal places shown. This does not increase source accuracy.

Combustion is complete to carbon dioxide and water with no nitrogen, sulfur, ash, dissociation, or excess-air correction.

Use internally consistent units and retain extra precision when carrying the result into another calculation.

Reviewed reference factors

Reviewed reference factors

OpenStax Chemistry 2e

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