Netflix Timed Text Style Guide
Netflix Subtitle CPS Limit: 20 vs 17 Characters Per Second
Netflix sets its English reading-speed limits in the English (USA) Timed Text Style Guide: up to 20 characters per second (CPS) for adult programs and 17 CPS for children's programs. The same guide caps a line at 42 characters and a subtitle event at two lines.
CPS is the cue's visible character count — spaces and punctuation included — divided by how long it stays on screen. A 60-character cue held for three seconds runs at exactly 20 CPS; the same text held for two seconds runs at 30 CPS and fails the limit.
The two reading-speed limits
Adult programs may run up to 20 CPS; children's programs up to 17 CPS. The two figures are ceilings for professional subtitling, not targets — most cues should sit comfortably below them. Children's content gets the lower number because younger viewers read more slowly.
Characters per line and line count
The English guide pairs the CPS limit with a 42-character maximum per line and a two-line maximum per event. Netflix prefers a single line wherever possible and only asks for a second line when the text exceeds the character limit. When a line does break, it should split after punctuation or before conjunctions — never between an article and its noun. See why 42 characters became the standard.
The timing rules that ride along with CPS
Reading speed does not stand alone. Netflix's general requirements set a minimum duration of 5/6 of a second (20 frames at 24 fps) and a maximum of 7 seconds per event, and require a minimum 2-frame gap between cues. A cue that is fast but brief usually fails on more than one of these at once.
How to check a file against the Netflix limit
Open your SRT or VTT in the subtitle reading speed checker and pick the English adult (20 CPS) or English children (17 CPS) preset. CueCheck reports the CPS of every cue, flags the ones over the limit, and estimates how much extra time each one would need. If you only work with SubRip files, the SRT CPS checker does the same thing with an SRT-first workflow.
Frequently asked questions
What is the Netflix subtitle CPS limit?
Netflix's English (USA) Timed Text Style Guide allows up to 20 characters per second for adult programs and 17 characters per second for children's programs. CPS is the cue's visible character count divided by its on-screen duration.
Why is the children's limit lower?
Children read more slowly, so a lower ceiling — 17 CPS instead of 20 — gives young viewers enough time. The lower number reflects slower reading rather than a shorter attention span.
Does the CPS limit apply to every language?
No. Netflix publishes a separate style guide per language, and each sets its own CPS ceiling. The 20/17 figures are specific to English (USA); other languages use different values.
Are spaces and punctuation counted toward CPS?
Yes. Netflix counts spaces and punctuation toward both the character count and the limit, which is why a line that looks short can still exceed 20 CPS.
Sources & verification date
The figures on this page were checked against the primary sources below on 2026-11-02. Style guides change; confirm the current guide before a formal delivery.