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Exclusion Calculator Lite v2.1

Calculating exclusion for user journeys

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Calculating exclusion for user journeys

This calculator estimates the proportion of the British population who would be unable to use a product or service because of the demands that it places on the users’ capabilities.

Using this calculator involves assessing the demands that a task, product or service places on a range of user capabilities. If you have not been trained in assessing demands, then please go to the Framework section in the Inclusive Design Toolkit.

Terms of use

This Exclusion Calculator Lite v2.1 is free for personal and educational use. For commercial use, please contact to enquire about licensing the Exclusion Calculator Pro, which also offers additional functionality, such as the ability to assess task sequences.

The University of Cambridge shall not be liable for any indirect or consequential damage, injury (whether loss of profit, loss of business, depletion of goodwill or otherwise), costs, expenses or other claims for consequential compensation whatsoever (howsoever caused) which arise out of or in connection with the use of this tool.

About us

This calculator was produced by the Cambridge Engineering Design Centre, as part of the ID‐3 Inclusive Design Consortium run by the Centre for Business Innovation.

Contact us at


This ‘freely available’ version of the exclusion calculator allows you to assess one task, using UK population data from 1997.

More advanced versions are available, subject to licence. These can enable functionality such as:

  • Assess a user journey of multiple tasks.
  • Load, save and export results.
  • Use different versions of the source population data, which have been re-profiled to account for UK demographic changes for 2016 and 2025, and for other years on request.
  • Use different versions of the population data, which have been re-profiled to account for demographic changes for other territories on request.
  • Perform exclusion calculations within Microsoft Excel.

All licence fees are spent on further development of the calculator, and all future developments are available to all license holders.

Please contact us for more details at

Download Exclusion Calculator Pro 2-6

Note this Excel version will only perform exclusion calculations if you purchase and enter a valid license code.

You may also want to download the Reference manual,

Target population

Target population

Total exclusion:
One or more demands
outside survey range
Size of target population:


Population statistics are derived from a reanalysis of the 1996/97 Disability Follow-up-survey, as described in Waller’s journal paper.

If you are presenting results produced by this tool in any media, you should include the following citation and disclaimer:

These results have been estimated using the Exclusion Calculator Lite v2.1, which is freely available from The results have not been verified or endorsed by the University of Cambridge and are subject to a disclaimer at


Save graph
View graph of all data broken down by capability

By capability

Load or save assessment

Load an assessment from a previously saved file or save current assessment to file.

  • All saved files will have an .ecd file extension.
  • When saving a file with some internet browsers, you may not be prompted to select the location of the saved file.

Start new assessment

Delete current assessment and create new assessment.

It is recommended you save a copy of your current assessment by selecting Save current assessment before starting a new assessment.

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