Workplace Air Quality Calculator

CO2, humidity, and temperature assessment for IAQ.

CO2 level (ppm)

Temperature (°C)

Relative humidity (%)

Number of occupants

Room area (m²)

Tab to move between fields

IAQ score (0-100)

CO2 score (0-100)80

Required ventilation (L/s)80

Est. current ventilation (L/s)250

Ventilation adequate (0/1)1

Health risk (1-3)1

How to Use This Calculator

Enter measured CO2 level (ppm), temperature (°C), and relative humidity (%).
Enter number of occupants and room area (m2).
Read the composite indoor air quality score and ASHRAE 62.1 ventilation adequacy assessment.
CO2 above 1000 ppm often indicates inadequate ventilation; above 1500 ppm is poor air quality.
Review recommended fresh air supply rate (L/s/person) to achieve acceptable CO2 levels.

How the result changes with CO2 level (ppm)

CO2 level (ppm): Measured carbon dioxide concentration in parts per million.
Temperature (°C): Indoor air temperature in degrees Celsius.
Relative humidity (%): Relative humidity percentage.
Number of occupants: Number of people in the space.
Room area (m²): Floor area of the space in square meters.

IAQ score (0-100): Overall indoor air quality score.
CO2 score (0-100): Carbon dioxide level assessment.
Required ventilation (L/s): ASHRAE 62.1 minimum ventilation rate.
Est. current ventilation (L/s): Estimated current ventilation from CO2 levels.
Ventilation adequate (0/1): 1 = meets ASHRAE 62.1 minimum requirements.
Health risk (1-3): 1=low, 2=moderate, 3=high IAQ-related health risk.

Identify Input Parameters
4 parameters
CO2 level (ppm) = 800, Temperature (°C) = 22, Relative humidity (%) = 45, Number of occupants = 20 = 5 input(s) provided
Calculate IAQ score
IAQ score
92 = 92
Calculate CO2 score
80 = 80
Calculate Required ventilation
Required ventilation
80 = 80