AQI Detail Page
AQI 50: cigarette equivalent, interpretation, and what to do next
At AQI 50, a full day of exposure is roughly equivalent to smoking 0.55 cigarettes.
AQI category
Good
PM2.5 estimate
12
µg/m³
Daily equivalent
0.55
cigarettes / 24h
If repeated daily
16.5
cigarettes / 30 days
What AQI 50 means
Short outdoor activity is generally low risk when AQI stays in this range.
People with asthma or smoke sensitivity should still watch for symptoms if the air smells smoky.
Exposure framing
1 hour: about 0.02 cigarettes.
2 hours: about 0.05 cigarettes.
24 hours: about 0.55 cigarettes.
7 repeated days: about 3.9 cigarettes.
Scenario guidance at AQI 50
These are the kinds of day-to-day decisions users commonly make from this reading.
Commute or errands
Good to go2 hours equals 0.05 cigarettes at AQI 50.
A short outdoor trip is usually manageable, but keep an eye on trends.
Outdoor exercise
Good to go1 hour equals 0.02 cigarettes at AQI 50.
Most people can train outdoors normally.
Kids, school, or playground time
Use caution3 hours equals 0.07 cigarettes at AQI 50.
Shorten outdoor time and watch for coughing, wheezing, or tiredness.
Sleeping with windows open
Use caution8 hours equals 0.18 cigarettes at AQI 50.
If the air smells smoky, close windows overnight and filter indoors instead.
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.
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