How accurate is the estimate?

It's as accurate as your inputs. The calculator multiplies slides × time-per-slide and adds your intro and Q&A buckets. If your real-world pacing differs from the defaults (e.g. you rehearse fast and present slow), tune the time-per-slide value to match how you deliver.

What's a good time per slide?

Most general-audience talks land around 1.5–2.5 minutes per slide, while technical or content-heavy decks often run 3+ minutes per slide. Lightning talks like Ignite or PechaKucha compress to 15–30 seconds per slide. Adjust based on your slide density and speaking pace.

Should I include the intro and Q&A?

Yes. These are the parts that commonly run long. The default intro of two minutes works for most talks; add time for housekeeping, sponsor logos, or a speaker bio. Q&A defaults to five minutes; extend it for technical or interactive sessions.

Does the calculator save my settings?

Yes, your time-per-slide, intro length, Q&A length, and toggle settings are saved in your browser's local storage. Next time you visit, the form is pre-filled with your last-used values. Clearing your browser data resets them to defaults.

Is my data sent anywhere?

No. Every calculation happens in your browser, not on our servers. Your slide counts and timing preferences never leave your device. We keep no server-side log of who calculated what.

Why is there a limit on slide count?

There isn't a limit. You can enter any number of slides. The calculator handles a 5-slide pitch and a 500-slide training deck the same way.

Can I use this for video presentations or webinars?

Yes. The math works the same in a room, on a video call, or in a recorded webinar. Adjust the per-slide time if your delivery pace changes between formats. Most speakers speak slower for recorded material.

What if my presentation has a fixed time slot?

Work backwards: subtract intro + Q&A from your total slot, divide the remainder by your slide count, and that's your target time per slide. If that number feels too tight (under 60 seconds for general slides, under 30 seconds for technical slides), consider trimming slides rather than rushing.

Free Presentation Length Calculator

How it works

Three steps to your estimate

Get an accurate runtime estimate for your talk in under a minute.

Enter Slide Count

Type in how many slides your presentation has. The calculator updates as you change the value. No submit button needed.

Adjust Pacing

Set your average minutes per slide, plus optional intro and Q&A windows. Defaults reflect typical presentation pacing, but you can adjust them to match your speaking style.

Read the Estimate

Total duration appears the moment you finish typing. The calculator remembers your preferences in your browser, so you don't re-enter them next time.

Learn More

Designed for real speakers

Modeled on how presentations run in the real world, not slide count multiplied by a flat number.

Accounts for Intro & Q&A

Most calculators multiply slides by a constant number. Ours adds dedicated intro and Q&A buckets, the two parts that run long in real talks.

Saves Your Preferences

Your default time-per-slide, intro length, and Q&A buffer are remembered in your browser so the next presentation you plan picks up where you left off.

Instant Recalculation

Tweak any number and the total updates right away. No submit button, no page reload. You get a live view of how each change affects your runtime.

Privacy by Default

Everything runs in your browser. Your slide counts and timing preferences stay on your device: no upload, no server, no tracking pixel.

Features

Why use a dedicated calculator?

Plenty of tools can multiply slide count by a number. Few help you plan a real talk.

Models Real Pacing

Separate fields for slides, intro, and Q&A mirror how real presentations run, instead of relying on a single "average per slide" guess.

Browser-Only

No download, no install, no signup. Open the page, type in your numbers, get your estimate. Works on every device.

Free Forever

The calculator stays free forever, with no free trial, no freemium gate, and no paywalled "advanced" features.

Saved Defaults

Set your typical pacing once. Future visits remember your time-per-slide, intro length, and Q&A buffer so re-planning is instant.

Privacy-First

Pure client-side calculation. Your inputs stay in your browser: no upload, no analytics on your slide counts, no tracking.

Six Languages

Interface available in English, German, Spanish, French, Indonesian, and Brazilian Portuguese.

Performance

Instant, accurate, private

Every input updates the total in real time, with no server roundtrip and no waiting.

Instant

Recalculation on every change

100%

Free, no signup

Data leaves your browser

Languages supported

Comparison

Why this calculator over alternatives

Several tools can estimate presentation length. Each makes different tradeoffs.

Approach		PowerPoint Rehearse Timings	Manual calculation	Speech-rate calculators
Works without running the deck	Yes	Must rehearse	Yes	Yes
Models intro and Q&A separately	Yes	Slide-only	Manual	Word-based
Free to use	Free	PowerPoint license	Free	Most are free
Browser-based	Yes	Desktop only	Any calculator	Yes
Account / signup	No signup	Microsoft account	No signup	Varies
Saves your defaults	Browser-stored	Per file only	Manual	Per session