Responsive tap reach distribution
Tests supplied control center points against one rectangular user-chosen reach zone, inclusively.
Accessibility and product usability measurements ↗THE SUMFIZZ LIBRARY
Accessibility and product usability measurements calculators
Explore 20 free tools for accessibility and product usability measurements. Find responsive tap reach distribution, keyboard focus route audit, form completion workload and more. Each calculator explains its inputs and method, with examples you can try using your own numbers.
THE SUMFIZZ LIBRARY
What are we working out?
Keyboard focus route audit
IDs are user-assigned positive integers, not DOM inspection.
Accessibility and product usability measurements ↗Form completion workload
Conditional path membership is explicitly supplied; one pass through each included field.
Accessibility and product usability measurements ↗Form error recovery burden
Events must be separate observed recovery episodes.
Accessibility and product usability measurements ↗Form label coverage audit
Inventory flags are provided by a human or external audit.
Accessibility and product usability measurements ↗Screen-reader heading structure audit
Flags upward heading-level jumps and missing/multiple main landmarks from supplied inventory.
Accessibility and product usability measurements ↗Accessible table header coverage
Each row is one data cell after expanding any spans.
Accessibility and product usability measurements ↗Caption reading speed audit
Word counts are supplied using a consistent counting convention.
Accessibility and product usability measurements ↗Caption timing overlap audit
Caption starts must be ordered; adjacent caption intervals are compared.
Accessibility and product usability measurements ↗Audio transcript completeness
Reference segments are nonoverlapping; covered seconds are already unioned within each segment.
Accessibility and product usability measurements ↗Accessible media alternative inventory
Add the bit values for each required/available alternative.
Accessibility and product usability measurements ↗Motion preference coverage audit
Positive integer IDs represent a supplied component inventory.
Accessibility and product usability measurements ↗Text zoom overflow audit
Each row is an observed zoom condition.
Accessibility and product usability measurements ↗Reading line-length distribution
Line lengths are measured using one consistent character-counting convention.
Accessibility and product usability measurements ↗Usability navigation path efficiency
Efficiency is shortest valid actions divided by observed actions for successful tasks only.
Accessibility and product usability measurements ↗Accessible document metadata coverage
Metadata status is supplied for each document.
Accessibility and product usability measurements ↗Accessible PDF reading-order audit
Unique positive integer IDs represent meaningful content units.
Accessibility and product usability measurements ↗Usability time-on-task comparison
Descriptive means include successful trials only; groups need not have equal sample sizes.
Accessibility and product usability measurements ↗Usability error severity workload
Priority score is occurrence count times chosen severity weight divided by estimated effort.
Accessibility and product usability measurements ↗Design-system accessibility regression coverage
Each row identifies one supplied component-state combination.
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