Algorithm to estimate Covid-19 infections risks by aerosol transmission in indoor environments

September 22, 2020

Researchers of the Max Planck Institute for Chemistry and the Cyprus Institute in Nicosia, Cyprus develop a simple spreadsheet algorithm to estimate Covid-19 infections risks from aerosol transmission in indoor environments. It calculates the risk of transmission with one highly infectious person in the room.


J. Lelieveld, F. Helleis, S. Borrmann, Y. Cheng, F. Drewnick, G. Haug, T. Klimach, J. Sciare, H. Su, U. Pöschl (2020)

Aerosol transmission of COVID-19 and infection risk in indoor environments

medRxiv 2020.09.22.20199489; doi:

Aerosol calculator

Aerosol-COVID 19 Risk Calculator (Excel)

Aerosol-COVID 19 Risk Calculator (online)

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