Glossary → Captions & subtitles
Captions & subtitles

Caption reading speed

Caption reading speed measures how fast text asks viewers to read, commonly in characters per second (CPS) or words per minute — professional guidelines typically cap adult captions around 17–20 CPS.

When speech outpaces reading speed, captioners condense wording rather than flash unreadable text. Exceeding the cap is the most common quality failure in auto-generated captions of fast speakers.

Related terms

Characters per second (CPS)Characters per second (CPS) is the standard measure of caption reading speed: total characters in a caption di… Caption line lengthCaption line length is the maximum characters per caption line — commonly 32 in broadcast tradition, up to 42 … Subtitle timingSubtitle timing (spotting) is deciding when each caption appears and disappears — synchronized to speech onset…

Frequently asked

What is Caption reading speed?

Caption reading speed measures how fast text asks viewers to read, commonly in characters per second (CPS) or words per minute — professional guidelines typically cap adult captions around 17–20 CPS.

Why does Caption reading speed matter?

When speech outpaces reading speed, captioners condense wording rather than flash unreadable text. Exceeding the cap is the most common quality failure in auto-generated captions of fast speakers.

What terms are related to Caption reading speed?

Closely related concepts: Characters per second (CPS), Caption line length, Subtitle timing — each has its own entry in this glossary.

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