AQI Detail Page
AQI 165: cigarette equivalent, interpretation, and what to do next
At AQI 165, a full day of exposure is roughly equivalent to smoking 3.17 cigarettes.
AQI category
Unhealthy
PM2.5 estimate
69.8
µg/m³
Daily equivalent
3.17
cigarettes / 24h
If repeated daily
95.1
cigarettes / 30 days
What AQI 165 means
Outdoor dose rises fast in this band, especially if windows are open or activity is strenuous.
Sensitive groups should stay indoors as much as possible and use cleaner indoor air.
Exposure framing
1 hour: about 0.13 cigarettes.
2 hours: about 0.26 cigarettes.
24 hours: about 3.17 cigarettes.
7 repeated days: about 22.2 cigarettes.
Scenario guidance at AQI 165
These are the kinds of day-to-day decisions users commonly make from this reading.
Commute or errands
Move indoors2 hours equals 0.26 cigarettes at AQI 165.
Keep trips short, wear a well-fitted mask, and avoid adding extra outdoor stops.
Outdoor exercise
Move indoors1 hour equals 0.13 cigarettes at AQI 165.
Take the workout indoors. Heavy breathing raises inhaled dose quickly.
Kids, school, or playground time
Move indoors3 hours equals 0.4 cigarettes at AQI 165.
Shift recess, pickup waiting, and playtime indoors when possible.
Sleeping with windows open
Move indoors8 hours equals 1.06 cigarettes at AQI 165.
Keep windows shut and rely on filtered indoor air.
Why the estimate is credible
The site first converts AQI into an estimated PM2.5 concentration and then applies Berkeley Earth's cigarette-equivalence framing.
The estimate is most useful for comparing air-quality dose across times, situations, and repeated days. It should not be treated as a literal smoking-equivalence medical claim.
Share or go deeper
Save this reading, share the link, or open another page that changes the next decision.