This calculator can be used to estimate the number of people that will be excluded from using a product or service, based on its capability demand. To use this resource, select each capability category in turn, and move the slider to the statement that approximately matches the demand level.

Each time that a demand is submitted, a table and graph is produced that shows how many people would be excluded based on that demand alone, together with the total number of people that would be excluded based on all the demands combined. Note that one person may have more than one impairment, in which case calculating the number of people excluded by a combination of demands is more complicated than simply adding up the number of people excluded by each demand alone

If you wish to reset all of the demand levels that you have submitted, simply hit the refresh button on your browser. The data refers to the GB adult population in 1996/97, which was 45.6 million people.