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Urban Calculator

A Design Support Tool running advanced analyses on-the-fly

Urban Calculator is an easy and user-friendly design support tool that can be used in different phases of the design process. During the first explorative sketches, feedback is given to make informed decisions, revise the design, and rerun the analysis until the project’s ambitions are met. No GIS expertise is needed because Urban Calculator runs these advanced GIS analyses at the backend of the tool. Instead, Urban Calculator focuses on visualizing and communicating results. Furthermore, no time is lost in finding and preparing data, because customized datasets are integrated into the tool.

Documentation can be downloaded here.

The analysis engine at the backend of the tool is based on Space Syntax theory and the open-source GIS-based tool PST (Place Syntax Tool), developed by KTH and Chalmers, in cooperation with Spacescape AB.

Street centrality is an indicator for the flow of people one can expect in each street. It is based on the street’s position in the street network. It answers the question: How integrated is this street and based on that, how many people can be expected to walk it?

Centrality analysis
Accessibility analysis

Accessibility to services calculates the total amount of attractions that can be reached when walking 500 meters from a location in all directions. It can be seen as a description of the presence of society in the city and answers the question: How many people, schools, or shops can be reached within a neighborhood?

Accessible built density gives an indication of the perceived density and is related to the intensity of a location. It is calculated using two variables, Floor Space Index (FSI) related to Gross Floor Area and Ground Space Index (GSI) related to building footprint and compactness of an area. These two variables in combination allow to relate the density of a location to a particular building type dominating an area.

Density analysis
Proximity analysis

Proximity analysis shows the actual distance to public transport, parks, or other services in the neighborhood. It answers the question: How far is it to the nearest bus stop, park, or school by walking/cycling or driving?

Quick facts


Chalmers Innovation Centre


  • Tool
  • Research
  • Evidence-based design
  • Urban design
  • Density Studies
  • Urban morphology
  • Urban analytics
  • Walkability


  • Meta Berghauser Pont
  • Evgeniya Bobkova
  • Lars Marcus
  • Ioanna Stavroulaki


  • Urban Calculator AB
  • Chalmers University of Technology

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