Accessibility Metrics

Quantitative methods for measuring and scoring the accessibility level of websites or digital content. Accessibility metrics typically work by evaluating web pages against checkpoints derived from standards like WCAG, computing pass or failure rates, and then synthesizing these into an overall score using weighted formulas. Different metrics assign checkpoint weights differently — some based on WCAG priority levels, others on user experience data. Well-known metrics include WAB (Web Accessibility Barrier Score), WAQM (Web Accessibility Quantitative Metric), UWEM (Unified Web Evaluation Methodology), and WAEM (Web Accessibility Experience Metric). Accessibility metrics enable large-scale benchmarking, policy compliance monitoring, and tracking of accessibility improvements over time.