Airborne Virus Risk Calculator

This webapp helps you estimate the spatially varying infection risk from airborne transmission of the SARS-CoV-2 virus in a rectangular indoor space. The model assumes that the infectious particles carrying the virus are carried around the room by a recirculating airflow, diffused due to turbulence in the air and removed by the room’s ventilation system, the natural inactivation of the virus and gravitational settling. For simplicity’s sake, the model only considers a single stationary, asymptomatic, infectious person in the room. For a simple explanation of the model and the parameters chosen, please refer here. For a full write-up of the scientific basis of the model, please refer to our paper.

Parameters

Ventilation

Ventilation rate (ACH)

Airflow speed (m/s)

Event

Event duration (hours) 0.5

Add a break? Yes

Set when the break starts and ends.

0.2 0.3

start end

Dynamic 2D room representation

Room dimensions

Presets

Classroom

Personal Office

Living Room

Bedroom

Hall

Custom

Length (m) 5

Width (m) 5

Height (m) 2.5

No mask

Infectious person

↔ 2.5

↕ 2.5

Breathing rate

Activity

Mask worn

Susceptible person

↔ 1.25

↕ 1.25

Breathing rate

Mask worn

Results

Disclaimer

Airborne Virus Risk Calculator

Parameters

Advanced options

Results

% infection

Infection risk at the end of the event

Calculate the concentration and risk at a specific position

Calculate the concentration throughout the room at the end of the event

Calculate the average concentration in the room

Calculate the average infection risk in the room