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Tools

Air Quality Converter

Convert wildfire smoke PM2.5 concentration in µg/m³ to AQI, or enter an AQI value to see the equivalent PM2.5 concentration.

µg/m³
AQI

Current category: Good

Air quality is satisfactory for most people.

AQI 50

How this converter works

This tool uses EPA PM2.5 AQI breakpoints and linear interpolation within each bucket. Values above the listed range are capped at AQI 500, the top of the standard AQI scale.

PM2.5 AQI buckets

  • Good: AQI 0–50, PM2.5 0–9 µg/m³
  • Moderate: AQI 51–100, PM2.5 9.1–35.4 µg/m³
  • Unhealthy for Sensitive Groups: AQI 101–150, PM2.5 35.5–55.4 µg/m³
  • Unhealthy: AQI 151–200, PM2.5 55.5–125.4 µg/m³
  • Very Unhealthy: AQI 201–300, PM2.5 125.5–225.4 µg/m³
  • Hazardous: AQI 301–500, PM2.5 225.5–325.4 µg/m³