How Long Should an Explainer Video Be? Lengths, Word Counts and the Evidence

Most explainer videos should run 60 to 90 seconds, and no single video should drift past six minutes without a reason. The right length is set by where the video plays and what the viewer must do next. Once you know that, length becomes a word count you can check before anyone draws a frame.

Explainer video length by where the video plays

Start with the placement. Where the video plays sets how much attention your viewer brings to it, and what they should do when it ends. This is how we scope length for a B2B explainer.

The word counts assume 140 spoken words a minute, the planning rate we script to. It fits a clear, unhurried English voiceover. Treat it as a starting point and time your own script aloud before you trust it.

The lengths are recommendations built from the evidence below and from what each channel asks of a viewer. A feed ad competes with the next post. A homepage visitor has chosen to look but has not chosen to stay. A new user in onboarding wants one thing done. Each job has a natural length, and the table is that length written down.

Turning length into a word count

Words are the useful unit for a brief, because words are what your team will debate in review. Agree the word count at kick-off, and the length takes care of itself.

At 140 words a minute, each second of runtime holds about two and a third words, so a 90-second homepage film holds about 210. Three things push the real number lower.

• Technical vocabulary. Product names, acronyms and figures take longer to say clearly than everyday words. For fintech, cybersecurity and AI scripts we plan nearer 120 to 130 words a minute.
• Silent beats for the interface. When the viewer needs to watch something happen on screen, the voice should stop. Each two-second pause for a UI moment uses up about five words of script.
• Other languages. A translated line can run longer than the English, and the animation timing has to hold it. If Bahasa Indonesia, Thai or Vietnamese versions will follow, leave headroom in the English. Our guide to localising video for Southeast Asia covers the details.

The practical test is simple. Read the script aloud at the pace your voice artist will use, with a stopwatch running. If it overruns, cut words. Asking the voice artist to read faster is the one fix that always makes the video worse.

What the research says about length

Nobody has run a controlled trial of the ideal homepage explainer. There is, however, a large body of research on how people watch and learn from video, and it points one way.

Two details in that study matter to a buyer. First, a longer video did not buy proportionally more attention; viewers simply left it earlier. Second, people engaged with tutorial videos differently from lecture videos, returning to them and jumping to the part they needed.[1] A product walkthrough is used like a reference, so its length is judged by how quickly the viewer can find the right moment.

The second body of evidence is about structure. An overview of 29 systematic reviews, covering 1,189 studies and 78,177 participants, found 11 multimedia design principles with significant positive effects on learning.[2] Segmenting is one of them: breaking content into pieces the viewer can pace. Signalling, which directs attention to the part of the screen that matters, is among those with the largest benefits.

Read together, the findings give a working rule. Keep any single video short. When the content is long, split it into parts the viewer controls.

Length is a decision about attention. Every second draws on a supply the viewer will not top up.

The better question to ask

The question most teams ask is how long an explainer video should be. The better question is: what does the viewer need to know to take the next step, and nothing more?

A homepage visitor’s next step is a demo request. They need to know what the product does, who it is for and why it is credible. That is three ideas, and three ideas fit in 60 to 90 seconds. A new user’s next step is one completed task. They need the steps for that task, which may take two minutes and should take no more.

Every idea beyond what the next step needs takes something away. It adds production time, and it spends the attention of the viewer you most wanted to keep. The fourth idea in a homepage explainer takes as much work as the first three and is seen by fewer people.

How to cut a script to length

First drafts of B2B explainers run long, almost without exception, because each stakeholder adds the feature they care about. These six passes bring a script back to length.

1. Give every scene one idea. Write the idea for each scene in a single line beside the script. A scene that needs two lines becomes two scenes, or loses one of them, and the storyboard gets simpler as the script gets shorter.
2. Cut the second example. First drafts illustrate every claim twice: a bank and an insurer, a retailer and a logistics firm. Keep the one your buyer works in. The same review found robust evidence for coherence, which means removing interesting material the viewer does not need.[2]
3. Keep one proof point. A single named result or credential lands. Three compete, and the viewer remembers none.
4. Swap spoken directions for visual cues. A line such as “in the top corner, you will see” spends words on a job a highlight does in a second. A zoom, a colour change or an arrow is signalling, one of the principles with the largest benefits,[2] and it uses no script.
5. Give the overflow its own video. Features that serve a second outcome belong in the product demo or the onboarding series, where segmenting lets the viewer take them one at a time.[2] Our comparison of explainer videos and product demo videos shows where each one lives.
6. Name the viewer above the first line. Write their job title at the top of the page. Each time a reviewer asks for a line back, check it against that person, and keep it only if they would miss it.

What you remove is rarely wasted. The cut material becomes the brief for your cutdowns, your follow-up email and your next video. For finished films that made those cuts well, see our B2B SaaS explainer video examples, and for how a script moves from draft to delivery, our explainer video production process.

When longer is the right answer

Short is the default, and three situations justify more time.

Procedures and product walkthroughs

When the viewer must learn to do something, a sequence of steps done in order, the evidence for animation is at its strongest.

A three to six minute walkthrough that shows a complete procedure earns its length, provided every step is one the viewer needs. Add chapter markers, so a returning viewer can jump straight to step four.

Series

When the content is genuinely long, split it. Six two-minute lessons the viewer can choose between fit the segmenting evidence far better than one twelve-minute film, because each piece stays short and the viewer sets the pace.[2] This is why an onboarding library is built as a series, and why a series built on one visual system gets quicker to produce with each new lesson.

Rooms with a captive audience

An investor pitch or a keynote opener plays to people who have chosen to sit and watch. Up to two minutes is reasonable there. The same attention limits still apply, and a strong 90 seconds leaves the founder time to speak.

Wherever a longer video sits, put it next to your existing material. A systematic review of 105 studies found video added to existing teaching produced an effect of g = 0.80, and video that replaced existing teaching produced g = 0.28.[4] A walkthrough that sits beside your help docs, and links into them, does the most work.

What length does to the schedule

Much of the work in an explainer is set before the first second of animation: the script, the visual style, the asset builds and the voice session. Those steps happen once whatever the runtime, so extra seconds mostly add animation and review time. Our animation guide explains how technique interacts with length, and our research-backed explainer video techniques show how to make each of those seconds count.

The length decision that hurts is the late one. Cutting 30 seconds at script stage takes a conversation. Cutting it after animation means throwing away finished scenes, then re-timing the rest and sending the whole edit back through review. Settle the word count before the storyboard, and you settle the schedule with it.

The short version

Match length to the job: 15 to 30 seconds for a social ad, 45 to 60 for a sales email, 60 to 90 for the homepage, up to two minutes for a pitch, two to three minutes per onboarding lesson. Plan at roughly 140 words a minute and time the script aloud. Keep every single video well short of six minutes, where engagement falls away,[1] and split long content into viewer-paced parts. Go longer only for procedures, and then only by the steps the viewer needs.

Frequently asked questions

How long should an explainer video be?

Most explainer videos should run 60 to 90 seconds. That is long enough to say what the product does, who it is for and why it is credible, and short enough to hold a first-time viewer. Social ads work at 15 to 30 seconds, sales emails at 45 to 60, and product walkthroughs can run three to six minutes when every step is needed.

How many words are in a 60-second explainer video script?

About 140 words. We script to a planning rate of roughly 140 spoken words per minute, so a 90-second script carries about 210 words and a two-minute script about 280. Technical vocabulary, pauses for on-screen action and translated versions all push the real number lower, so time every script aloud at a natural pace before you approve it.

Is a 2-minute explainer video too long?

A two-minute explainer is too long for a homepage or a social ad and about right for an investor pitch or a detailed product story. The test is whether every idea in it is one the viewer needs for their next step. If the script holds three ideas and runs two minutes, cut it to 90 seconds.

What is the ideal video length for B2B buyers on LinkedIn?

Plan 15 to 30 seconds for a LinkedIn ad, and treat it as a cutdown of a longer master. The job of a feed ad is to earn the click; the explanation happens on the landing page, where a 60 to 90 second explainer can do the full work. Build both from one script and one visual system, so the ad and the explainer read as one campaign.

How long should a product onboarding or tutorial video be?

Two to three minutes per lesson, arranged as a series. Research across 6.9 million video sessions found engagement falling away sharply past about six minutes, and segmenting content into viewer-paced parts is one of the multimedia design principles with significant positive effects on learning. Each lesson should cover one task, from the first click to the finished result.

Should an explainer be the same length for Malaysia, Indonesia or other APAC markets?

Keep the same length and write the English script with headroom. Translated voiceover in Bahasa, Thai or Vietnamese can run longer than English, and the animation has to hold each version. Script slightly under the target length, confirm every language at brief stage, and the studio can time scenes to fit all versions from the start.