AQI Comparison
AQI 50 vs AQI 225
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 225
7.94
cigarettes per 24h
Very Unhealthy: This is an indoor-air-management problem, not just an outdoor comfort problem.
What changes between these two AQI values
Difference in PM2.5
162.7
µg/m³
Difference per day
7.39
cigarettes
Direction
AQI 225 is materially heavier exposure
Moving from AQI 50 to AQI 225 changes both dose and the protection plan.
Calculate AQI 50
Open the interactive calculator with AQI 50 loaded.
Calculate AQI 225
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.