Air quality cigarette equivalent
Enter a U.S. PM2.5 AQI value and exposure time to estimate an air quality cigarette equivalent. The calculator converts AQI to an estimated PM2.5 concentration, then applies Berkeley Earth's 22 µg/m³ for 24 hours comparison. It is a communication aid—not a medical diagnosis or a literal measure of smoke inhaled.
Trust Signals
Review policy
August 8, 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.
24-hour comparison
These examples treat the entered number as a U.S. PM2.5 AQI that remains constant for 24 hours. They do not apply to ozone, carbon monoxide, or another pollutant driving the reported AQI.
| U.S. PM2.5 AQI | Category | Estimated PM2.5 | 24-hour cigarette equivalent |
|---|---|---|---|
| AQI 50 | Good | 9 µg/m³ | 0.41 |
| AQI 100 | Moderate | 35.4 µg/m³ | 1.61 |
| AQI 150 | Unhealthy for Sensitive Groups | 55.4 µg/m³ | 2.52 |
| AQI 200 | Unhealthy | 125.4 µg/m³ | 5.7 |
| AQI 300 | Very Unhealthy | 225.4 µg/m³ | 10.25 |
| AQI 400 | Hazardous | 275.2 µg/m³ | 12.51 |
Estimates use current U.S. EPA PM2.5 AQI breakpoints and Berkeley Earth's rough population-level health-impact equivalence. See the methodology and limitations.
“Air quality to cigarettes” and “AQI vs cigarettes” are common names for this comparison. The number applies Berkeley Earth's rough population-level health-impact equivalence for long-term PM2.5 and cigarette-smoking risks. It is not a direct particle-mass equivalence, personal inhaled dose, risk prediction, or diagnosis.
Popular AQI values
Open a commonly searched AQI value for its 24-hour cigarette equivalent, PM2.5 estimate, health category, and practical guidance.
Start with the number or question you already have. Every tool leads to a concrete calculation, comparison, or action plan instead of another generic article.
Tools →1. Interpret
Use a rough cigarette-equivalent health-impact framing, PM2.5 estimates, and all-day comparisons to decide whether this is background noise or a day-changing risk.
2. Decide
Turn one reading into commute, exercise, kids, and indoor-air decisions instead of staring at a raw score.
3. Revisit
Save common scenarios, share result URLs, and jump into city, scenario, and comparison pages when the same problem returns.
Scenario Guides
These pages are built for repeat visits when the same question keeps coming back: commute, school, exercise, or smoke response.
Use AQI to decide whether a daily commute is routine, cautionary, or worth changing.
Default check: AQI 110 for 2h
Translate AQI into a clear decision for running, cycling, or training outside.
Default check: AQI 85 for 1h
Plan school runs, recess, and after-school time when children are more sensitive than adults.
Default check: AQI 95 for 3h
Use AQI to decide when normal air-quality habits are not enough and smoke response should begin.
Default check: AQI 165 for 24h
Credibility
The calculator converts AQI back to PM2.5 using EPA-style AQI breakpoints, then uses Berkeley Earth’s rough, population-level cigarette-equivalent health-impact framing.
We treat this as a decision aid, not a diagnosis or personal health prediction. The output compares concentration-by-time scenarios; it is not particle mass, inhaled dose, or cigarettes actually smoked.
Methodology and update policy are documented so users and search engines can see how the site is maintained.
See formulas, source framing, limitations, and how the content is reviewed.
Understand what each AQI band means before you even calculate.
Move from concern to action with masks, filtration, and clean-air-room planning.
Compare a clean day with a smoky day to see how quickly the rough health-impact estimate and advice change.
Move from passive checking into a smoke-day action plan for windows, workouts, sleep, and clean air.
Enter particle concentration directly if your monitor shows PM2.5 instead of AQI.
City Guides
These guides combine live AQI when available, local planning patterns, and next-step actions so the page is useful even after the first visit.
Interpret LA air quality for commuting, outdoor exercise, and smoke-season decisions.
Suggested starting check: AQI 105
Use AQI to decide on transit, neighborhood differences, and wildfire smoke response in the Bay Area.
Suggested starting check: AQI 92
Interpret AQI for street-level exposure, commuting, exercise, and occasional smoke events in NYC.
Suggested starting check: AQI 88
Use AQI to manage wildfire smoke swings, school decisions, and indoor-air preparation in Seattle.
Suggested starting check: AQI 120
Use AQI to plan routine exposure, commuting, and home protection when pollution remains elevated for longer periods.
Suggested starting check: AQI 175
Use AQI to decide on outdoor time, family routines, and indoor protection when pollution episodes build.
Suggested starting check: AQI 160
Continue Exploring
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Common questions about the AQI to Cigarettes calculator