Advanced Combustion Calculators
Chemical Equation Balancer for Combustion
Balance the complete combustion equation for a hydrocarbon fuel CxHy, finding the oxygen, CO2, and H2O coefficients.
Combustion Chamber Pressure Calculator
Calculate the pressure change inside a fixed-volume combustion chamber from changes in gas moles and temperature.
Combustion Chamber Temperature Calculator
Calculate the resulting gas temperature inside a combustion chamber after a known quantity of heat is added.
Combustion Chamber Volume Calculator
Calculate the internal volume of a cylindrical combustion chamber from its diameter and length.
Combustion Efficiency Loss Calculator
Calculate overall combustion efficiency by summing stack loss, unburned fuel loss, and radiation loss components.
Combustion Reaction Products Calculator
Calculate the full molar breakdown of CO2, H2O, excess O2, and N2 produced from combusting a hydrocarbon fuel with excess air.
Combustion Residence Time Calculator
Calculate how long combustion gases spend traveling through a combustion chamber from chamber length and gas velocity.
Combustion Turndown Ratio Calculator
Calculate a burner or combustion system's turndown ratio from its maximum and minimum stable firing rates.
Dew Point of Flue Gas Calculator
Calculate the water vapor dew point temperature of flue gas from its moisture content, to prevent corrosive condensation.
Dry Basis to Wet Basis Calculator
Convert a dry-basis flue gas concentration back to its actual wet-basis value including water vapor dilution.
Equivalence Ratio Calculator
Calculate the equivalence ratio (phi) of a combustion mixture from actual and stoichiometric air-fuel ratios.
Fuel Blend Calculator
Calculate the mass-weighted average heating value of a two-component fuel blend from mass fractions and individual heating values.
Heat Transfer from Combustion Calculator
Calculate the convective heat transfer rate from hot combustion gas to a cooler surface using the standard convection model.
HHV to LHV Calculator
Convert a fuel's higher heating value (HHV) to lower heating value (LHV) from its hydrogen mass fraction.
Lambda Calculator (Combustion)
Calculate the lambda value of a combustion mixture from actual and stoichiometric air-fuel ratios.
Moisture Correction Calculator
Calculate the as-received heating value of a fuel after correcting for moisture content and latent heat losses.
Oxidizer Requirement Calculator
Calculate the total oxidizer required for combustion when using enriched air or pure oxygen instead of standard air.
Stack Loss Calculator
Calculate stack loss percentage from stack temperature, ambient temperature, and CO2 percentage using the Siegert relation.
Stoichiometric Combustion Calculator
Calculate the stoichiometric oxygen and air requirement, on a molar basis, to completely combust a hydrocarbon fuel CxHy.
Wet Basis to Dry Basis Gas Calculator
Convert a wet-basis flue gas concentration to its dry-basis equivalent by removing water vapor dilution.
Engineering-Grade Combustion Math
Beyond basic air-fuel ratios, industrial combustion engineering deals with reaction chemistry, chamber conditions, and heat losses that determine how efficiently fuel actually converts to usable energy. These eighteen calculators cover the deeper mechanics: stoichiometry, residence time, stack losses, and moisture corrections used in boiler and furnace design.
Combustion needs some excess air beyond the exact stoichiometric amount to ensure fuel burns completely rather than producing soot and carbon monoxide — but every bit of that extra air also has to be heated and then vented up the stack, carrying energy with it. Most well-tuned industrial burners land somewhere between 10% and 20% excess air, the practical middle ground between complete combustion and wasted heat. Find that middle ground with the Stack Loss Calculator and Equivalence Ratio Calculator.
Popular Advanced Combustion Calculators
- Stoichiometric Combustion Calculator — finds the exact air-to-fuel ratio for complete combustion with zero excess air.
- Dew Point of Flue Gas Calculator — finds the temperature at which flue gas moisture begins to condense; if flue gas cools below this point inside ductwork, condensing moisture combines with combustion byproducts to form corrosive acids.
- Lambda Calculator (Combustion) — expresses the air-fuel ratio as a ratio to stoichiometric, the standard way combustion engineers describe mixture richness.
Need the basic air-fuel ratio math first? Start with the Air & Fuel Calculators, or check downstream exhaust analysis in the Emissions Calculators.