Calculation explainedHow this result was calculated
The formula, your substituted values, and the evaluated result are shown below.
This is an educational screening index, not an air-quality forecast. Photochemical models require pollutant speciation, weather, chemistry, transport, and background concentrations.
How the Smog Calculator works
Create a simple relative smog-potential indicator from precursor emissions and atmospheric multipliers.
Using the result responsibly
This is an educational screening index, not an air-quality forecast. Photochemical models require pollutant speciation, weather, chemistry, transport, and background concentrations.