Score / AssessmentCritical
Air Quality Index Calculator
For consumers, students & professionals. Score, risk band, explanation and actions.
Unit system— all inputs and outputs convert automatically
Inputs
Enter your data — results update live.
US EPA Air Quality Index — dominant: PM2.5
99
AQI
Moderate — acceptableNotes
- • Dominant pollutant driving overall AQI: PM2.5.
- • Air quality is acceptable for most people.
- • WHO 2021 annual PM2.5 guideline: ≤ 5 µg/m³.
Breakdown chart
Visual comparison of each component ().
- AQI from PM2.5
- 99.00
- AQI from PM10
- 63.00
- AQI from Ozone
- 51.00
- AQI from NO₂
- 38.00
- AQI from SO₂
- 29.00
- AQI from CO
- 23.00
Methodology & sources
Formula
AQI = max( I(PM2.5), I(PM10), I(O₃), I(NO₂), I(SO₂), I(CO) ) — US EPA linear breakpoint interpolationSources
- • US EPA Air Quality Index Technical Assistance Document 2024
- • WHO Global Air Quality Guidelines 2021