How does the Air Quality Index Calculator work?

Calculate AQI from five pollutants: PM2.5, PM10, O₃, NO₂, SO₂ Then: Each pollutant scaled 0-500 based on health thresholds Then: Reported AQI is the maximum component.

Can you give an example of how to use the Air Quality Index Calculator?

Example: Input PM2.5 = 35 μg/m³ (moderate), others low gives a result of AQI = 100 (Moderate: acceptable air quality) (Health advisory issued).

Is the Air Quality Index Calculator free to use?

Yes — completely free with no registration, download, or subscription required. All calculations happen instantly in your browser.

How accurate is the Air Quality Index Calculator?

Our Air Quality Index Calculator uses verified mathematical formulas and is accurate to multiple decimal places. Results are calculated in real-time using the same methods used by professionals.

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Air Quality Index Calculator

PM2.5 (µg/m³)

PM10 (µg/m³)

O3 (ppb)

Air Quality Index quantifies air pollution severity on a 0-500 scale. It helps identify health risks and pollution levels.

Difficulty:beginner

References

›Air Quality Index — Wikipedia

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Air Quality Index Calculator