How Long Should a Presentation Script Be? (The Exact Formula)

You've finished your slides. Now you need to write the script. But how long should it actually be?

Most presenters guess — and they either end up rushing through the last few slides or awkwardly filling dead air. The good news is there's a simple formula that takes the guesswork out completely.

The formula

The average person speaks at 130 words per minute during a presentation. That's slower than casual conversation — you pause, you breathe, you let points land.

So the formula is straightforward:

Presentation duration (minutes) × 130 = your target word count

Here's what that looks like in practice:

• 5-minute presentation → 650 words
• 10-minute presentation → 1,300 words
• 15-minute presentation → 1,950 words
• 20-minute presentation → 2,600 words
• 30-minute presentation → 3,900 words
• 60-minute presentation → 7,800 words

These numbers might feel larger than you expect. That's because a complete script includes everything — transitions between slides, pauses written out, context you'd normally improvise on the spot.

How to distribute words across slides

Not every slide deserves equal time. A title slide gets 15 seconds. A complex diagram might get two full minutes. The rule of thumb is to divide your total word count by your number of slides to get your average — then adjust from there.

For example, a 10-minute presentation with 10 slides gives you an average of 130 words per slide. That's roughly one solid paragraph per slide — tight, but enough to make a clear point.

Slides that need more time:

• Your main argument or key data slide
• Any slide where you're asking the audience to make a decision
• Complex diagrams or frameworks

Slides that need less time:

• Title and agenda slides
• Transition slides ("Let's move on to...")
• Summary slides where you're just recapping

Why pacing matters more than word count

The 130 words-per-minute figure assumes a measured, confident delivery pace. But nerves speed you up. Rehearsal slows you down. First-time presenters often speak 20–30% faster than they think they do.

The safest approach: write to your target word count, then time yourself reading it aloud. If you finish in 80% of your allotted time, that's your buffer for questions, pauses, and the unexpected.

What about Q&A?

If your session includes Q&A, subtract that from your total. A 30-minute slot with 10 minutes of Q&A means you're writing a 20-minute script — 2,600 words, not 3,900.

Always clarify with your event organiser: is the time slot for presentation only, or does it include Q&A? Getting this wrong is one of the most common causes of running over.

The fastest way to hit your word count

Writing a complete word-for-word script for every slide is time-consuming. You have to balance depth, transitions, timing, and natural-sounding language — all at once.

That's exactly what SlideScript is built for. Upload your slide deck, set your presentation duration, and SlideScript generates a timed, word-for-word speaking script that hits your target word count automatically — slide by slide.

Try it free — no sign-in required.