PM2.5 to AQI Converter
Translate microgram-per-cubic-meter readings from sensors or monitors into the Air Quality Index category for quick risk assessment.
CalcSimpler Examples
- PM2.5 at 35.0 µg/m³ ⇒ 99 AQI
- PM2.5 at 12.0 µg/m³ ⇒ 50 AQI
FAQ
Why truncate to one decimal place?
EPA guidance requires truncating the concentration at 0.1 µg/m³ increments before mapping to the AQI scale.
Does this cover other pollutants?
No. Each pollutant has its own breakpoints. This converter is specific to fine particulate matter (PM2.5).
What if the value exceeds 500 µg/m³?
The AQI is capped at 500, so extremely high concentrations are reported as 500+.
Additional Information
- Values are capped at 500 AQI, matching the U.S. EPA breakpoints for PM2.5.
- The concentration is truncated to one decimal place before conversion, as prescribed by the standard formula.
- Pair AQI with local health guidance to interpret exposure limits.
CalcSimpler