The "140 Words a Minute" Number, and Why It’s the Wrong Target
By Mira Lindqvist · Voice & Pace
What is a good speaking rate in words per minute? There is a range, not a target. The often quoted 140 to 160 words a minute describes ordinary conversation; use it only as a rough check. Slow down for new or difficult ideas and move faster through what the room already knows. Above all, do not be slow throughout: in the research, that was what cost speakers.
Search for ideal public-speaking pace and you'll find a fairly consistent range cited across coaching sources: roughly 140 to 160 words per minute, sometimes narrower, occasionally wider, usually presented as a target to hit. The range is a reasonable description of how fast ordinary English conversation runs. Treating it as a target for a talk, rather than a description of conversation, is where the advice goes wrong.
What the research actually says about speed
The best-known study is from 1976. Norman Miller and colleagues played listeners the same persuasive message recorded at different speeds. Faster delivery made the speaker seem more knowledgeable and more objective, and made the message more persuasive.1 But look at the numbers in their second experiment and the story is narrower than "talk fast". Agreement rose sharply between a slow recording at 111 words a minute and a moderate one at 140, and barely moved between 140 and 191. The damage was done by being slow, not by failing to be fast.
A study that sped up and slowed down recordings of real voices by computer found a second, quieter effect. Listeners rated the faster versions as more competent, steadily and in a straight line. They rated the speakers as most benevolent, though, at their natural rate.2 Speed buys authority and can cost warmth.
And speed changes how a message is processed. Smith and Shaffer found that fast speech made a message listeners disagreed with more persuasive, by leaving them less room to argue back, and a message they agreed with less persuasive, by leaving them less room to think of reasons to agree.3
None of this produces a single right number. It produces a range where nothing bad happens, and a set of reasons to move within it.
Why a single target number is the wrong frame
Speaking rate isn't a single dial that should sit at one setting for the duration of a talk. It should move with the content, the same way a piece of music doesn't hold one tempo throughout. A complex, unfamiliar idea needs a slower rate, because the audience needs processing time the words themselves don't provide. A list of familiar, low-stakes items can move quickly without losing anyone, because there's less new information per word for the audience to absorb.
A speaker who holds a constant 150 words per minute regardless of content is applying a uniform pace to non-uniform information. They move too fast through the hard parts and, often without realising it, too slowly through the easy ones, because the pace never changes to signal "this part needs less of your attention".
The number also depends on the language
Words per minute is an English-shaped measure. Languages pack different amounts into a syllable, and a study of seventeen languages found that speakers of languages with dense syllables talk more slowly, and speakers of languages with light syllables faster, so that they end up conveying information at a broadly similar rate.4 A comfortable pace in one language can look slow or fast in words per minute in another. If you speak in more than one, a single target is even less meaningful.
How Exprea treats the number
We measure pace and deliberately do not score it as a target. A recording's rate is its word count divided by its full length, silences included, so it reads lower than rates that divide by speaking time only. That rate is turned into a 0 to 100 value that is full marks anywhere from 130 to 160 words a minute, falls in a straight line outside that band, and stops falling at 50 for slow speech and 40 for fast. Most people speak inside the band without trying, which is the point: the band exists to flag something unusual, not to reward hitting a number.
That value is never an axis of its own. It feeds Clarity, Tonality and Energy as a small corroborating input beside the coaching model's own judgement, for reasons set out in why pace is not an axis. The report also draws a timeline of your rate in 10-second slices, which is more useful than the average, because it shows where you sped up.
Where a fixed number helps
The number works as a diagnostic for rehearsal rather than a target for delivery. If you don't know your own baseline rate, you can't notice when you're deviating from it, which is the thing that matters. Timing a run-through and dividing the words by the minutes is a reasonable way to establish that baseline. The free speaking speed test does that sum for you: you talk for up to a minute and it shows your words per minute. The number itself, once known, is far less useful than the awareness of when and why you're departing from it.
Nerves are one common reason for a change you did not choose, and a rehearsal timeline will show it: the opening minute, or the point you were least sure of, running faster than the rest. Whether a listener notices depends on the room, but you will at least know.
Know your baseline, then leave it
Stop treating 140 to 160 as a target to hit. Use it, if at all, as a rough check that you are not far outside the ordinary range. Then vary your pace on purpose with the difficulty of the content: slow and leave space for the idea that is new, move briskly through what the room already knows. Above all, don't be slow throughout. In the one study that tested it most directly, that was the setting that cost the speaker.
References
- Miller, N., Maruyama, G., Beaber, R. J., & Valone, K. (1976). Speed of speech and persuasion. Journal of Personality and Social Psychology, 34(4), 615–624. https://doi.org/10.1037/0022-3514.34.4.615
- Smith, B. L., Brown, B. L., Strong, W. J., & Rencher, A. C. (1975). Effects of speech rate on personality perception. Language and Speech, 18(2), 145–152. https://doi.org/10.1177/002383097501800203
- Smith, S. M., & Shaffer, D. R. (1991). Celerity and cajolery: rapid speech may promote or inhibit persuasion through its impact on message elaboration. Personality and Social Psychology Bulletin, 17(6), 663–669. https://doi.org/10.1177/0146167291176009
- Coupé, C., Oh, Y. M., Dediu, D., & Pellegrino, F. (2019). Different languages, similar encoding efficiency: Comparable information rates across the human communicative niche. Science Advances, 5(9). https://doi.org/10.1126/sciadv.aaw2594
Go deeper: What is speaking rate?