Emissions Calculators

Turning Fuel Burned Into Pollutants Released

Combustion emissions are calculated from a consistent principle: a known emission factor (pollutant mass per unit of fuel burned or heat released) multiplied by fuel consumption gives total pollutant output. Ten calculators here cover the major combustion pollutants — CO2, NOx, SO2, CO, and particulate matter — using standard emission factor methodology.

Popular Emissions Calculators

Ten tools span greenhouse gases and criteria pollutants:

• CO2 Emissions Calculator — calculates carbon dioxide output from fuel type and quantity burned.
• NOx Emission Calculator — estimates nitrogen oxide emissions based on combustion temperature and fuel nitrogen content.
• SO2 Emission Calculator — calculates sulfur dioxide output from fuel sulfur content.
• Emission Factor Calculator — converts measured pollutant output into a standardized emission factor per unit of fuel or energy.
• Greenhouse Gas Calculator — converts combustion emissions into CO2-equivalent using global warming potential factors.

Why NOx Forms Even From Nitrogen-Free Fuel

Fuel sulfur converts almost directly to SO2, so sulfur emissions scale predictably with fuel sulfur content, but NOx is different — a meaningful share of NOx (called thermal NOx) forms from atmospheric nitrogen and oxygen reacting at high flame temperature, not from nitrogen already in the fuel. This is exactly why NOx control strategies often focus on lowering peak flame temperature (staged combustion, flue gas recirculation) rather than only on fuel selection, since even a perfectly nitrogen-free fuel still produces thermal NOx at high enough combustion temperatures.

Frequently Asked Questions

Does burning less fuel always reduce emissions proportionally?
For CO2 and SO2, yes, roughly — they scale directly with fuel quantity, but NOx depends more on flame temperature and excess air than fuel quantity alone, so efficiency improvements don't always cut NOx by the same proportion.

Explore More

Need the flue gas measurements behind these emissions? See the Flue Gas Calculators, or check broader environmental impact in the Environmental Calculators.