Accessibility

Time to read

Hold each line for 0.6 s plus 0.3 s a word, with a minimum of 1.2 s.

A bar made of a long segment of 0.6 seconds and four short segments of 0.3 seconds each, labelled four words, 1.8 seconds. 0.6 s4 words × 0.3 s held 1.8 s, set to 2.0 s

Takeaways

  • 0.6 s + 0.3 s per word, 1.2 s minimum.
  • At most three words a second.
  • Cut words rather than speed up.

What it means

People read at about three words a second, and text that goes too fast is lost to everyone who reads more slowly or in a second language. If a line does not fit, cut words; speeding up the type breaks reading.

In a RasanAI film

Each line stays fully on screen for the formula time, rounded up. Four words hold for 1.8 s, so 2.0 s; six words 2.4 s. The motion gate measures this, and a launch hook never asks for more than three words a second.

Origins and sources

Reading speed of about three words a second is the engine's measured working figure. Related guidance: WCAG 2.2.1, Timing Adjustable. Read the source.

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