AQI Comparison
AQI 50 vs AQI 450
A one-step change in AQI category can translate into a meaningful jump in particle dose.
AQI 50
0.55
cigarettes per 24h
Good: Most people can keep their normal routine.
AQI 450
19.31
cigarettes per 24h
Hazardous: Treat this as a severe exposure event.
What changes between these two AQI values
Difference in PM2.5
412.7
µg/m³
Difference per day
18.76
cigarettes
Direction
AQI 450 is materially heavier exposure
Moving from AQI 50 to AQI 450 changes both dose and the protection plan.
Calculate AQI 50
Open the interactive calculator with AQI 50 loaded.
Calculate AQI 450
Use the interactive calculator to test a different duration.
See how the numbers are derived
Review the AQI-to-PM2.5 and PM2.5-to-cigarettes methodology.