Oxygen & Gas Composition Calculators
Avogadro's Law Volume Ratio Calculator
Calculate gas volume change from mole quantity change at constant temperature and pressure using Avogadro's Law.
CO2 Equivalent (GWP) Calculator
Calculate CO2-equivalent emissions from a gas mass and its Global Warming Potential (GWP) factor.
Combustion Gas Composition Calculator
Calculate the nitrogen percentage of combustion gas by difference from measured CO2%, O2%, and CO% using the Orsat analysis approach.
Exhaust Gas Composition Calculator
Calculate the mass-percentage composition of exhaust gas from the masses of CO2, H2O, N2, and O2 present.
Gas Compressibility Factor Calculator
Calculate the gas compressibility factor Z from pressure, volume, moles, and temperature to check deviation from ideal gas behavior.
Gas Cylinder Contents Calculator
Estimate remaining gas mass in a cylinder from pressure, volume, temperature, and molar mass using the ideal gas law.
Gas Density Calculator
Calculate gas density from pressure, molar mass, and temperature using the ideal gas law.
Gas Expansion Calculator
Calculate the new volume of a fixed quantity of gas after a change in pressure and temperature using the combined gas law.
Gas Mixing Calculator
Calculate the flow-weighted average concentration when two gas streams with different flow rates and compositions are mixed together.
Gas Mixture Heating Value Calculator
Calculate the mole-fraction weighted heating value of a two-component fuel gas blend.
Gas Mixture Molar Mass Calculator
Calculate the average molar mass of a two-component gas mixture from mole fractions and individual molar masses.
Gas Partial Pressure Calculator
Calculate a gas component's partial pressure in a mixture from mole fraction and total pressure using Dalton's Law.
Gas Specific Gravity Calculator
Calculate a gas's specific gravity relative to air from its molar mass, relevant to leak dispersion and safety.
Gas Volume Correction to Standard Conditions Calculator
Convert a gas volume measured at actual pressure and temperature to standard reference conditions (Nm3).
Graham's Law Diffusion Rate Calculator
Calculate the relative diffusion or effusion rate between two gases from their molar masses using Graham's Law.
Humid Air Molar Mass Calculator
Calculate the average molar mass of humid air from its water vapor mole fraction, showing why humid air is lighter than dry air.
Ideal Gas Combustion Calculator
Calculate the volume occupied by combustion product gases using the ideal gas law from moles, temperature, and pressure.
Oxygen Concentration Calculator
Calculate the volumetric oxygen concentration of a gas stream from oxygen flow and total gas flow.
Oxygen Requirement Calculator
Calculate the theoretical mass of pure oxygen needed to completely combust one kilogram of fuel from its ultimate analysis.
Wobbe Index Calculator
Calculate the Wobbe Index of a fuel gas from heating value and specific gravity, the standard measure of gas interchangeability.
The Gas That Makes Combustion Possible
Combustion depends entirely on oxygen availability and concentration — small shifts in gas composition change flame behavior, temperature, and completeness of the reaction. These eight calculators cover gas composition and mixing math relevant to combustion.
Popular Oxygen & Gas Composition Calculators
- Combustion Gas Composition Calculator — breaks down the full product gas mixture resulting from a combustion reaction.
- Gas Mixing Calculator — calculates the resulting composition when combining two gas streams of different makeup.
- Ideal Gas Combustion Calculator — applies ideal gas law relationships to combustion product volumes.
Related: Advanced Combustion Calculators, Air & Fuel Calculators.