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Exclusion calculation

The following resources help you to estimate the proportion of the British population who would be unable to use a product or service because of the demands it places on the users' capabilities.

Exclusion calculator
(External site)

Estimate the number of people unable to use a product or service because of the demands that it places on users' capabilities. The tool involves estimating demands on a range of capabilities, including vision, thinking and dexterity.

This helps to quantify accessibility and prioritise improvements.

SEE-IT
(External site)

Assess the visual clarity of text or graphics that are handheld. The tool involves examining visual clarity at different distances, and using this to estimate the proportion of the population who would be unable to see the design comfortably.

SEE-IT is best used within a browser on a mobile device.

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