Air Quality Risk Decision Tool
Turn Air Quality Index into Actionable Exposure Decisions with cigarette-equivalent framing
Translate AQI into practical risk, scenario guidance, and cigarette-equivalent exposure so you know what today's air means and what to do next.
What the current exposure means
AQI becomes PM2.5 dose, cigarette-equivalent framing, and category-based risk.
What action to take
See guidance for workouts, commuting, kids, windows open, and smoke days.
What to view next
Jump into AQI detail pages, city guides, methodology, and deeper blog resources.
Decision Tool
AQI to Cigarettes Calculator
Input the Air Quality Index (AQI) where you live and how many hours you've been exposed. The calculator will tell you what the impact to your health is in cigarettes.
Understand the number
Turn a raw AQI reading into a particle dose you can picture.
Decide what to do
Get scenario guidance for commuting, exercise, kids, and windows.
Reuse and share it
Save recent checks and copy result URLs for later decisions.
Input mode
Enter a US-style AQI value between 0 and 500.
Quick scenario presets
Recent checks
Saved results appear here after you calculate.
Start with a real AQI reading
The result panel will translate it into cigarette-equivalent exposure, action guidance, and common-scenario decisions.
How the estimate works
Step 1: I converted AQI back to PM 2.5 particle concentration. That's the number of particles in the air that are a certain size. For this operation I used the same equation as the Air Now calculator.
Step 2: based on this research, the health impact of a particle concentration of 22μg/m3 per 24 hours is equivalent to about 1 cigarette.
This tool is a decision aid, not a medical diagnosis. It is most useful for comparing exposure levels, planning protective steps, and seeing how repeated days can add up.
Source summary
Trust Signals
Why to trust this calculator
Review policy
March 2026. We update supporting pages when calculator logic, live data behavior, or source framing changes.
Primary sources
AQI uses EPA / AirNow breakpoint logic. Cigarette-equivalent framing follows Berkeley Earth’s PM2.5 interpretation.
Live data layer
City pages use EPA AirNow where supported, with cached fallbacks and planning baselines if the API fails or coverage is unavailable.
1. Interpret
Make the AQI number understandable
Use cigarette-equivalent framing, PM2.5 estimates, and all-day exposure comparisons to decide whether this is background noise or a day-changing risk.
2. Decide
Choose the right action for the situation
Turn one reading into commute, exercise, kids, and indoor-air decisions instead of staring at a raw score.
3. Revisit
Build repeat-use habits
Save common scenarios, share result URLs, and jump into city, scenario, and comparison pages when the same problem returns.
Scenario Guides
Start from the decision you actually need to make
These pages are built for repeat visits when the same question keeps coming back: commute, school, exercise, or smoke response.
Commute exposure planner
Use AQI to decide whether a daily commute is routine, cautionary, or worth changing.
Default check: AQI 110 for 2h
Outdoor exercise risk guide
Translate AQI into a clear decision for running, cycling, or training outside.
Default check: AQI 85 for 1h
Kids and school exposure guide
Plan school runs, recess, and after-school time when children are more sensitive than adults.
Default check: AQI 95 for 3h
Wildfire smoke response plan
Use AQI to decide when normal air-quality habits are not enough and smoke response should begin.
Default check: AQI 165 for 24h
Credibility
Why this estimate is worth using
The calculator converts AQI back to PM2.5 using EPA-style AQI breakpoints, then uses Berkeley Earth cigarette-equivalent framing to make exposure easier to understand.
We treat this as a decision aid, not a medical diagnosis. The output is built to help you compare dose, plan behavior, and decide what to check next.
Methodology and update policy are documented so users and search engines can see how the site is maintained.
Methodology and update policy
See formulas, source framing, limitations, and how the content is reviewed.
AQI levels explained
Understand what each AQI band means before you even calculate.
Protection playbook
Move from concern to action with masks, filtration, and clean-air-room planning.
AQI comparison pages
Compare a clean day with a smoky day to see how quickly dose and advice change.
Wildfire smoke planner
Move from passive checking into a smoke-day action plan for windows, workouts, sleep, and clean air.
PM2.5 cigarette calculator
Enter particle concentration directly if your monitor shows PM2.5 instead of AQI.
City Guides
City pages built for practical repeat use
These guides combine live AQI when available, local planning patterns, and next-step actions so the page is useful even after the first visit.
Los Angeles AQI planning guide
Use AQI to plan commuting, outdoor time, and indoor-air decisions in Los Angeles.
Suggested starting check: AQI 105
San Francisco AQI planning guide
Use AQI to plan commuting, outdoor time, and indoor-air decisions in San Francisco.
Suggested starting check: AQI 92
New York City AQI planning guide
Use AQI to plan commuting, outdoor time, and indoor-air decisions in New York City.
Suggested starting check: AQI 88
Seattle AQI planning guide
Use AQI to plan commuting, outdoor time, and indoor-air decisions in Seattle.
Suggested starting check: AQI 120
Delhi AQI planning guide
Use AQI to plan commuting, outdoor time, and indoor-air decisions in Delhi.
Suggested starting check: AQI 175
Beijing AQI planning guide
Use AQI to plan commuting, outdoor time, and indoor-air decisions in Beijing.
Suggested starting check: AQI 160
Continue Exploring
Related reading that supports the next decision
Reading AQI Forecasts: How to Plan Your Week Ahead
Stop reacting to bad air days. Learn to read AQI forecasts like a pro and plan your outdoor activities, exercise, and errands around air quality patterns.
9 min read
Best Air Quality Apps and Monitoring Tools in 2026
From free smartphone apps to professional-grade monitors, discover the best tools to track air quality in real-time and make informed decisions about your health.
9 min read
Indoor vs Outdoor Air Quality: The Surprising Truth
You spend 90% of your time indoors, but is indoor air cleaner? The answer might surprise you. Understand indoor pollution sources and how to create truly clean air at home.
10 min read
PM2.5 vs PM10 vs Ozone: Understanding Different Pollutants
Not all air pollution is the same. Learn the critical differences between PM2.5, PM10, ozone, and other pollutants—which matters most and when to worry about each.
9 min read
FAQs
Common questions about the AQI to Cigarettes calculator