SO2 Emission Calculator

A Direct, Predictable Conversion From Fuel Sulfur

Unlike NOx, SO2 formation is straightforward — virtually all sulfur in a fuel oxidizes to SO2 during combustion, making it one of the most predictable pollutant calculations in combustion engineering.

The Formula

SO2 Mass = Fuel Mass × Sulfur Fraction × (64/32)

64/32 is the molecular weight ratio of SO2 to elemental sulfur.

Worked Example

Burning 2,000 kg of fuel oil with 1.5% sulfur:

SO2 = 2,000 × 0.015 × 2 = 60 kg

How to Use This Calculator

Enter the Fuel Mass burned.
Enter the fuel's Sulfur percentage by mass.
Select Calculate to get total SO2 emitted.

Related Calculations

Need CO2 emissions from the same fuel? See the CO2 Emissions Calculator, or check the stoichiometric air this combustion needs in the Stoichiometric Air Requirement Calculator.