Air Quality Index Calculator
Calculate the Air Quality Index (AQI) from pollutant concentrations and get health recommendations.
Particulate Matter
24-hour average. Good: 0-12, Moderate: 12-35
Gaseous Pollutants
Personal Factors
AQI Scale Reference
0-50Good
51-100Moderate
101-150Unhealthy (Sensitive)
151-200Unhealthy
201-300Very Unhealthy
301-500Hazardous
Air Quality Index
99
Moderate
Dominant pollutant: PM2.5
Acceptable; some risk for sensitive people
Generally acceptable for most people
Pollutant Sub-Indices
PM2.5 (35 ug/m3)AQI: 99
PM10 (50 ug/m3)AQI: 46
Ozone (O3) (60 ppb)AQI: 67
NO2 (40 ppb)AQI: 38
SO2 (20 ppb)AQI: 29
CO (4 ppm)AQI: 45
Health Risk Assessment
+25%
Respiratory Risk
+15%
Cardio Risk
+0.0%
Mortality Risk
Relative risk increase compared to clean air conditions. Based on epidemiological studies.
Activity Guidelines
Outdoor Exercise
Acceptable
Window Ventilation
OK to open
Pollutant Sources
PM2.5/PM10: Combustion, dust, wildfires, industry
Ozone: Forms from NOx + VOCs + sunlight
NO2: Vehicle exhaust, power plants
SO2: Fossil fuel combustion, refineries
CO: Incomplete combustion, vehicles
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
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Formula Source: Standard Mathematical References
by Various
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.