  Determining the carrying capacity of urban tourism destinations and public
spaces is essential for sustainable management. This paper presents an online
tool that calculates pedestrian carrying capacities for user-defined areas
based on OpenStreetMap (OSM) data. The tool considers physical, real, and
effective carrying capacities by incorporating parameters such as area per
pedestrian, rotation factor, corrective factors, and management capacity. The
carrying capacity calculator aids in balancing environmental, economic, social,
and experiential factors to prevent overcrowding and preserve the quality of
life for residents and visitors. This tool is particularly useful for tourism
destination management, urban planning, and event management, ensuring positive
visitor experiences and sustainable infrastructure development. We detail the
implementation of the calculator, its underlying algorithm, and its application
to the Santa Maria Maior parish in Lisbon, highlighting its effectiveness in
managing urban tourism and public spaces.
