How Many Cigarettes Are You Smoking Just By Breathing?
Convert today's PM2.5 pollution into an equivalent number of cigarettes, then share a clear visual card for your city.
Delhi AQI 178
Today's Air
Equivalent to approximately
8.1
Cigarettes / Day
Total in selected time period
14,782.5
cigarettes across 5 years in Delhi
PM2.5 178 ug/m3 - updated 31 Jul 2026, 6:48 pm
Per Week
56.7/ week
Per Month
243/ month
Per Year
2,956.5/ year
Hazardous. Stay indoors whenever possible.
In Delhi, over 5 years, you have taken in the equivalent of 14,782.5 cigarettes, if today's PM2.5 level stayed the same.
Equivalent to
- 🚬 Smoking 8.1 cigarettes today
- 🚬 56.7 cigarettes this week
- 🚬 243 cigarettes this month
- 🚬 2956.5 cigarettes this year
- 🚬 14,782.5 cigarettes across 5 years in this city, if today's air stayed the same
Why convert AQI to cigarettes?
A simple way to understand invisible PM2.5 exposure.
PM2.5 particles are tiny enough to travel deep into the lungs. Numbers like 75 ug/m3 or 150 ug/m3 can feel abstract, so this calculator turns PM2.5 into an easier comparison: estimated cigarettes per day.
This does not mean breathing polluted air is identical to smoking. Cigarette smoke and ambient air pollution have different chemical mixtures, exposure patterns and health effects. The comparison is only a visualization based on the Berkeley Earth approximation.
FAQ
Common questions about PM2.5 and cigarette equivalents
How is this calculated?
The calculator uses the Berkeley Earth approximation that 22 ug/m3 of PM2.5 exposure over a day is comparable to one cigarette per day. Cigarettes per day equals PM2.5 divided by 22.
Is it scientifically accurate?
It is an educational estimate, not a medical measurement. It helps people visualize pollution exposure, but individual risk depends on duration, health, activity level, pollutant mix and many other factors.
Does AQI equal cigarettes?
No. AQI and cigarettes are different concepts. This tool converts PM2.5 concentration into a cigarette-equivalent visualization so the exposure is easier to understand.
What PM2.5 level equals one cigarette?
Using the Berkeley Earth approximation, 22 ug/m3 PM2.5 over one day is roughly equal to one cigarette per day.
Should I wear a mask today?
If PM2.5 is poor or worse, especially above 35 ug/m3, consider a well-fitting N95 or KN95 mask outdoors. People with asthma, heart disease, children and older adults should be more cautious.
Disclaimer: This calculator is an educational visualization tool based on the Berkeley Earth estimate that approximately 22 ug/m3 PM2.5 exposure over one day is comparable to smoking one cigarette. It is intended to help people understand air pollution exposure and should not be interpreted as a medical diagnosis.