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This is not the current AirNow website. To navigate to the current AirNow website, please go to www.airnow.gov. This website is historical material reflecting the AirNow website as it existed on September 12, 2018. This website is no longer updated and links to external websites and some internal pages may not work.

AQI Calculator

AQI logo

DIRECTIONS: Choose the tab for AQI to Concentration or the tab for Concentration to AQI.
Select a pollutant, then enter the AQI value or the concentration (in units). Click on “Calculate” to see the results.
Select a Pollutant
Enter the AQI:


Concentration Units: AQI Category
Sensitive
Groups		 Health Effects
Statements		 Cautionary
Statements
Select a Pollutant
Units:
Enter the Concentration:
AQI AQI Category
Sensitive
Groups		 Health Effects
Statements		 Cautionary
Statements