🫁

TrueBreath - Smoke Equivalence Calculator - Singapore

Health

Check Singapore's air quality and see how many cigarettes worth of smoke you're breathing. Real-time PM2.5 data and health impact calculator.

The Hero Stat

Breathing air in South, Singapore today =

Smoking 1.9 Cigarettes

Based on PM2.5 level: 42.0 μg/m³

The Math

Berkeley Earth Rule: 22 μg/m³ of PM2.5 ≈ 1 cigarette

Current PM2.5: 42.0 μg/m³

Calculation: 42.0 ÷ 22 = 1.91 cigarettes

Life Lost

You lost approx 0.3 hours of life expectancy today

Based on: 1.9 cigarettes × 11 minutes per cigarette

PM2.5 Level

Current PM2.5

42.0 μg/m³

WHO Safe Limit

15 μg/m³

2.8x above safe limit

Air Quality Details

AQI

117

Unhealthy for Sensitive Groups

Main Pollutant

PM2.5

PM10

22.0

O3

17.0

Last updated: 4/3/2026, 8:00:00 AM

Most common question related to South, Singapore's Air Quality

How many cigarettes is South, Singapore's air equivalent to?

Breathing air in South, Singapore is equivalent to smoking approximately 1.9 cigarettes per day, based on the current PM2.5 level of 42.0 μg/m³.

Is South, Singapore's air quality safe?

South, Singapore's current PM2.5 level is 42.0 μg/m³. The WHO safe limit is 15 μg/m³ for 24-hour exposure. This exceeds the safe limit and poses health risks.

What health risks does South, Singapore's air quality pose?

With a PM2.5 level of 42.0 μg/m³, South, Singapore's air quality may cause minor health issues, particularly for people with respiratory conditions. It's advisable to limit outdoor activities during high pollution periods.

What is the current AQI in South, Singapore?

The Real-Time Air Quality Index (AQI) in South, Singapore is 117. This is considered Unhealthy for Sensitive Groups. AQI values above 100 indicate unhealthy air quality, especially for sensitive groups.

What is the main pollutant in South, Singapore's air?

The primary pollutant affecting South, Singapore's air quality is PM2.5. This pollutant is the main contributor to the current AQI of 117 and PM2.5 level of 42.0 μg/m³.

How does South, Singapore's PM10 level compare to PM2.5?

South, Singapore's current PM10 level is 22.0 μg/m³, while PM2.5 is 42.0 μg/m³. PM10 particles are larger (2.5-10 micrometers) and less harmful than PM2.5, which can penetrate deep into the lungs and bloodstream.

What is the ozone (O3) level in South, Singapore?

The current ozone (O3) level in South, Singapore is 17.0 μg/m³. Ozone is a harmful gas that can cause respiratory problems, especially during physical activity. The WHO guideline for 8-hour exposure is 100 μg/m³.

What are the nitrogen dioxide (NO2) levels in South, Singapore?

The nitrogen dioxide (NO2) level in South, Singapore is currently 0.0 μg/m³. NO2 is primarily produced by vehicle emissions and industrial processes. High levels can worsen respiratory conditions and increase susceptibility to respiratory infections.