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AQI Calculator India

Calculate Indian Air Quality Index (AQI) from measured pollutant concentrations.

Based on India’s National Air Quality Index methodology.

Enter the applicable averaged pollutant concentrations below. PM10, PM2.5, NO2, SO2, NH3 and Pb use 24-hour average concentrations. O3 and CO use 8-hour average concentrations.

You may enter one pollutant to calculate its individual sub-index. For an overall AQI consistent with the Indian AQI data sufficiency rule, at least three pollutants should be available and at least one must be PM10 or PM2.5.
Pollutant Concentrations
Important: CO is entered in mg/m³, not µg/m³.
Overall AQI
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Pollutant Concentration Sub-index Category
View India AQI pollutant breakpoints
AQI Category PM10 PM2.5 NO₂ O₃ CO SO₂ NH₃ Pb
Good
0–50		 0–50 0–30 0–40 0–50 0–1.0 0–40 0–200 0–0.5
Satisfactory
51–100		 51–100 31–60 41–80 51–100 1.1–2.0 41–80 201–400 0.6–1.0
Moderate
101–200		 101–250 61–90 81–180 101–168 2.1–10 81–380 401–800 1.1–2.0
Poor
201–300		 251–350 91–120 181–280 169–208 10.1–17 381–800 801–1200 2.1–3.0
Very Poor
301–400		 351–430 121–250 281–400 209–748 17.1–34 801–1600 1201–1800 3.1–3.5
Severe
401–500		 431+ 251+ 400+ 748+ 34+ 1600+ 1800+ 3.5+

Air Quality Index (AQI): AQI converts measured concentrations of multiple air pollutants into pollutant-specific sub-indices. The highest valid sub-index determines the overall AQI and corresponding air-quality category.

Reference: Indian National Air Quality Index methodology and CPCB pollutant breakpoint framework. This calculator is intended for educational and preliminary assessment use. Official AQI reporting depends on validated monitoring data, averaging periods and data-availability requirements.