How many words is a 10-minute video?

At a normal narration pace of about 150 words per minute, roughly 1,500 words of spoken script. Add pauses and edits and the finished video usually lands nearer eleven minutes, so writing 1,350 to 1,450 words is the safer aim if ten minutes is a hard target.

How many words per minute should I write for?

150 is the sensible default for narration. Documentary and tutorial pacing sits around 120, and energetic Shorts narration often passes 200. The rate matters more than the word count, because the same script can differ by two minutes across those extremes.

Why is my finished video longer than my script estimate?

Because the estimate covers narration only. Intros, outros, b-roll beats, pauses for a visual to land and the silence around edits all add time. Ten to fifteen per cent on top of the narration figure is normal.

Is there a video length that earns more?

Videos over eight minutes can carry mid-roll ads, which is the one length threshold with a direct revenue consequence. Beyond that, length itself does not pay — watch time does, and a padded twelve-minute video usually earns less than a tight seven-minute one.

Should I write the script or let AI draft it?

Either, as long as you edit for pace afterwards. Drafted scripts tend to run long and even, which reads as flat. The editing pass where you cut a third of it is what makes the narration sound like someone thinking rather than reciting.

How long should a YouTube script be?

There are two questions hiding inside “how long should my script be”, and mixing them up is why so much advice on this is useless. One is arithmetic: how many words produce a given number of minutes. The other is editorial: how long the video should be. The first has a real answer. The second does not, and anyone giving you a confident number for it is guessing.

Start with the arithmetic, because it is the part you can actually control.

The word counts, by length

Narration for video sits near 150 words per minute. That is the default our script length calculator uses, and it holds across most English-language explainer and documentary content. From there the maths is simple.

Target length	Words at 120 wpm	Words at 150 wpm	Words at 180 wpm
60 seconds	120	150	180
3 minutes	360	450	540
5 minutes	600	750	900
8 minutes	960	1,200	1,440
10 minutes	1,200	1,500	1,800
15 minutes	1,800	2,250	2,700
20 minutes	2,400	3,000	3,600

Notice the spread. A 1,500-word script is a ten-minute video at normal pace, a twelve-and-a-half-minute video read slowly, and an eight-and-a-half-minute video read fast. The pace you write for matters more than the word count you hit, and most people never decide on one — they write, generate a voice at whatever the default speed is, and accept whatever comes out.

Decide the pace first. It changes how you write, not just how you read:

Around 120 wpm — documentary, tutorials, anything where the viewer needs to follow a process. Shorter sentences, more full stops, more room for a visual to land before the next idea arrives.
Around 150 wpm — the default for explainers, list videos, most faceless long-form. Comfortable to listen to for ten minutes without effort.
180 wpm and above — Shorts, high-energy commentary, anything under two minutes. Sustainable briefly. Across fifteen minutes it exhausts people.

Why the finished video is always longer

Every word-count estimate covers narration and nothing else. The video contains more than narration.

Add an intro that is not in the script. Add an outro. Add the beat where you hold on a visual so the viewer can read a number on screen. Add the fractional pause around every cut. Add the breath the voice takes at each paragraph break — real or synthetic, it takes time.

In practice these add ten to fifteen per cent on top of the narration figure, and more if your edit is visually dense. So:

A 1,500-word script at 150 wpm is ten minutes of narration and about eleven minutes of video.
If ten minutes is a hard target, write nearer 1,350 words and let the edit fill the rest.
If eight minutes is a hard target — and there is a reason it might be, below — write nearer 1,050 words, not 1,200.

This is the single most common miss. People write exactly to the calculator, then wonder why every video overshoots. The calculator is right; the script was never the whole video.

The one length threshold that actually means something

Most video-length advice is folklore. There is one exception worth knowing.

Videos over eight minutes can carry mid-roll ads — the ad breaks placed inside the video rather than only at the start. That is a direct, mechanical revenue difference, and it is why so many faceless channels target the eight-to-twelve-minute range. At 150 wpm, that range is roughly 1,200 to 1,800 words.

It is also why so many videos in that range feel padded. The threshold creates an incentive to stretch a six-minute idea to nine minutes, and viewers can feel it. A padded nine-minute video with forty per cent average view duration produces less watch time than a tight six-minute video with seventy per cent — and watch time, not length, is what the recommendation system responds to.

So treat eight minutes as a threshold to clear when the material genuinely clears it, not as a quota to pad toward. If your idea is a five-minute idea, publish five minutes.

Beyond that one threshold, there is no magic length. Twelve minutes is not better than seven. The channels that publish twenty-minute videos successfully are the ones whose material justifies twenty minutes.

Writing to a length without padding

If you have a length target and your draft is short, the fix is not more words about the same thing. It is more things.

Add a case, not a clause. A concrete example adds ninety seconds and holds attention. Restating your point in different words adds ninety seconds and loses it.
Add the objection. The strongest section in most explainers is the one that says “the obvious counter-argument is X, and here is why it does not hold”. It is genuinely new information, so it earns its runtime.
Add the number. Anywhere you have written “expensive” or “a lot”, replace it with the actual figure and where it comes from. Specifics are both shorter to justify and more interesting.

And if the draft is long, cut in this order: adjectives, then transitions, then whole paragraphs that restate the previous paragraph. Almost every first draft has a section that exists because the writer was thinking on the page. Cut that one.

Shorts are a different problem entirely

Under sixty seconds, word count stops being the constraint and the first sentence becomes the whole game. A 150-word Short is not a small long-form video — it has no room for setup, so the structure inverts: conclusion first, evidence second, no outro at all.

For Shorts, count words to make sure you are under the limit with room to spare. A 60-second slot with 180 words of script leaves no space to breathe, and rushed narration reads as low effort. Aim for 130 to 150 words in a 60-second Short and let the pauses do some work.

A workflow that keeps the numbers honest

Decide the pace before writing — 120, 150 or 180. Write in that rhythm.
Draft, without watching the count. Counting while drafting produces padding.
Paste it into the script length calculator and check the estimate at your chosen pace, with the pause allowance switched on.
Subtract ten to fifteen per cent from your target to leave room for intro, outro and edit beats.
Cut to fit using the order above. Never add to fit.
Split it into shots with the scene splitter — a script that resists being split into scenes is usually a script with a structural problem, and this is the cheapest place to find that out.

If you only take one number away: 150 words per minute, minus about twelve per cent for everything that is not narration. That single adjustment gets most people’s videos landing where they intended for the first time.