AQI Converter – Free Online Tool
Quick Answer
Convert Air Quality Index between US EPA, Indian CPCB, and European standards instantly with this free AQI converter from Toolscal. Compare pollution levels across measurement systems without signup or downloads.
Convert Air Quality Index between US EPA, Indian CPCB, Chinese MEP, and European CAQI standards
What is AQI Converter? An AQI converter is a free tool by Toolscal that converts Air Quality Index between US EPA, Indian CPCB, and European standards. Compare pollution levels across different measurement systems.
🌍 International Standards: Convert between US EPA, Indian CPCB, Chinese MEP, and European CAQI air quality standards.
Enter the PM2.5 concentration to see AQI values across different standards
Standards Comparison
Most widely used globally. Breakpoints: 0-50 Good, 51-100 Moderate, 101-150 Unhealthy for Sensitive Groups, 151-200 Unhealthy, 201-300 Very Unhealthy, 301+ Hazardous.
Used in India. Generally gives higher AQI values for the same PM2.5 concentration compared to US EPA. Breakpoints designed for Indian conditions.
Used in China. Similar to US EPA but with different breakpoints. Accounts for higher baseline pollution levels in Chinese cities.
Uses 0-100+ scale. Categories: Very Low (0-25), Low (25-50), Medium (50-75), High (75-100), Very High (100+). Different methodology from other standards.
Common PM2.5 Values (µg/m³)
About This Tool
Converts between Air Quality Index values and pollutant concentrations (PM2.5, PM10, etc.) using EPA standards.
Accuracy Information
How to Use
- 1Enter PM2.5 concentration (µg/m³)
- 2View AQI values across different standards
- 3Compare health categories for each system
- 4Understand air quality in different regions
Why Use This Tool?
- Compare international air quality data
- Understand foreign air quality reports
- Research air quality standards
- Travel planning across different countries
- Environmental health studies
Frequently Asked Questions
Why do different countries have different AQI values?
Different countries use different calculation methods and breakpoints. The same PM2.5 concentration gives different AQI values. Toolscal converts between US EPA, Indian CPCB, Chinese, and European standards.
Which AQI standard should I use?
Use your country's standard: US EPA for USA, CPCB for India, MEP for China. Toolscal shows all standards simultaneously for easy comparison when traveling.
What is PM2.5?
PM2.5 is particulate matter ≤2.5 micrometers that penetrates lungs. It's the primary pollutant for AQI calculation. Toolscal converts PM2.5 values to all major AQI standards.
How to convert US AQI to Indian AQI?
Enter PM2.5 concentration in Toolscal to see both standards. US uses 0-500 scale, India uses 0-500 with different breakpoints. Same pollution = different AQI numbers.
What PM2.5 level is safe?
WHO recommends annual PM2.5 <5 µg/m³. US EPA "Good" is 0-12 µg/m³ (AQI 0-50). India "Good" is 0-30 µg/m³. Toolscal shows health categories for all standards.
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