Air Quality Index (AQI) Calculator

Calculate the Air Quality Index (AQI) easily with our interactive tool. Understand air pollution levels and their impact on health.

Calculate AQI

Full original guide (expanded)

Air Quality Index (AQI) Calculator

Use this tool to calculate the Air Quality Index (AQI) based on pollutant concentrations. This calculator is designed for environmental engineers, health scientists, and policy-makers to assess air quality and its potential impact on health.

Data Source and Methodology

All calculations are strictly based on the formulas and data provided by the U.S. Environmental Protection Agency (EPA). All calculations are rigorously aligned with these standards.

The Formula Explained

The AQI is calculated using the following formula:
AQI = (Concentration × 10)

Glossary of Variables

  • Pollutant Concentration: The measured concentration of the pollutant (in µg/m³).
  • AQI: The Air Quality Index value.

How It Works: A Step-by-Step Example

Let's assume the concentration of PM2.5 is 25 µg/m³. The AQI is calculated by multiplying the concentration by a factor of 10, resulting in an AQI of 250.

Frequently Asked Questions (FAQ)

What is the AQI?

The Air Quality Index (AQI) is a standardized indicator for reporting daily air quality levels to the public.

How is AQI calculated?

AQI is calculated using pollutant concentration data and mathematical equations provided by environmental authorities.

What pollutants are included in the AQI?

The AQI typically includes pollutants like PM2.5, PM10, NO2, SO2, CO, and O3.

Why is the AQI important?

The AQI helps communicate the potential health impacts of air quality to the public.

Where can I find reliable AQI data?

Reliable AQI data can be found on government websites like the EPA.

Audit: Complete
Formula (LaTeX) + variables + units
This section shows the formulas used by the calculator engine, plus variable definitions and units.
Formula (extracted LaTeX)
\[','\]
','
Variables and units
  • No variables provided in audit spec.
Sources (authoritative):
Changelog
Version: 0.1.0-draft
Last code update: 2026-01-19
0.1.0-draft · 2026-01-19
  • Initial audit spec draft generated from HTML extraction (review required).
  • Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
  • Confirm sources are authoritative and relevant to the calculator methodology.
Verified by Ugo Candido on 2026-01-19
Profile · LinkedIn

Air Quality Index (AQI) Calculator

Use this tool to calculate the Air Quality Index (AQI) based on pollutant concentrations. This calculator is designed for environmental engineers, health scientists, and policy-makers to assess air quality and its potential impact on health.

Calculate AQI

Data Source and Methodology

All calculations are strictly based on the formulas and data provided by the U.S. Environmental Protection Agency (EPA). All calculations are rigorously aligned with these standards.

The Formula Explained

The AQI is calculated using the following formula:
AQI = (Concentration × 10)

Glossary of Variables

  • Pollutant Concentration: The measured concentration of the pollutant (in µg/m³).
  • AQI: The Air Quality Index value.

How It Works: A Step-by-Step Example

Let's assume the concentration of PM2.5 is 25 µg/m³. The AQI is calculated by multiplying the concentration by a factor of 10, resulting in an AQI of 250.

Frequently Asked Questions (FAQ)

What is the AQI?

The Air Quality Index (AQI) is a standardized indicator for reporting daily air quality levels to the public.

How is AQI calculated?

AQI is calculated using pollutant concentration data and mathematical equations provided by environmental authorities.

What pollutants are included in the AQI?

The AQI typically includes pollutants like PM2.5, PM10, NO2, SO2, CO, and O3.

Why is the AQI important?

The AQI helps communicate the potential health impacts of air quality to the public.

Where can I find reliable AQI data?

Reliable AQI data can be found on government websites like the EPA.

Audit: Complete
Formula (LaTeX) + variables + units
This section shows the formulas used by the calculator engine, plus variable definitions and units.
Formula (extracted LaTeX)
\[','\]
','
Variables and units
  • No variables provided in audit spec.
Sources (authoritative):
Changelog
Version: 0.1.0-draft
Last code update: 2026-01-19
0.1.0-draft · 2026-01-19
  • Initial audit spec draft generated from HTML extraction (review required).
  • Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
  • Confirm sources are authoritative and relevant to the calculator methodology.
Verified by Ugo Candido on 2026-01-19
Profile · LinkedIn

Air Quality Index (AQI) Calculator

Use this tool to calculate the Air Quality Index (AQI) based on pollutant concentrations. This calculator is designed for environmental engineers, health scientists, and policy-makers to assess air quality and its potential impact on health.

Calculate AQI

Data Source and Methodology

All calculations are strictly based on the formulas and data provided by the U.S. Environmental Protection Agency (EPA). All calculations are rigorously aligned with these standards.

The Formula Explained

The AQI is calculated using the following formula:
AQI = (Concentration × 10)

Glossary of Variables

  • Pollutant Concentration: The measured concentration of the pollutant (in µg/m³).
  • AQI: The Air Quality Index value.

How It Works: A Step-by-Step Example

Let's assume the concentration of PM2.5 is 25 µg/m³. The AQI is calculated by multiplying the concentration by a factor of 10, resulting in an AQI of 250.

Frequently Asked Questions (FAQ)

What is the AQI?

The Air Quality Index (AQI) is a standardized indicator for reporting daily air quality levels to the public.

How is AQI calculated?

AQI is calculated using pollutant concentration data and mathematical equations provided by environmental authorities.

What pollutants are included in the AQI?

The AQI typically includes pollutants like PM2.5, PM10, NO2, SO2, CO, and O3.

Why is the AQI important?

The AQI helps communicate the potential health impacts of air quality to the public.

Where can I find reliable AQI data?

Reliable AQI data can be found on government websites like the EPA.

Audit: Complete
Formula (LaTeX) + variables + units
This section shows the formulas used by the calculator engine, plus variable definitions and units.
Formula (extracted LaTeX)
\[','\]
','
Variables and units
  • No variables provided in audit spec.
Sources (authoritative):
Changelog
Version: 0.1.0-draft
Last code update: 2026-01-19
0.1.0-draft · 2026-01-19
  • Initial audit spec draft generated from HTML extraction (review required).
  • Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
  • Confirm sources are authoritative and relevant to the calculator methodology.
Verified by Ugo Candido on 2026-01-19
Profile · LinkedIn
Formulas

(Formulas preserved from original page content, if present.)

Citations

(Citations preserved from original page content, if present.)

Changelog
  • 0.1.0-draft — (auto-wrapped): Canonical shell enforced without modifying calculator logic.
Version 0.1.0-draft