How to Use a Teleprompter: Speed, Eye Line and Setup

Set the speed in words per minute: at a fixed pixel speed, bigger text slowed reading by a factor of about 8.5 in our measurement. Plus where to put the reading line, how to write for the prompter and how to use glass.

Pick a Speed in Words per Minute, Not Pixels

Speed is the setting that decides whether a prompter read sounds natural, and most prompters set it in the wrong unit. A scroll of so many pixels per second only means something for one text size in one window: make the text bigger and each line holds fewer words, so the same pixel speed asks you to read slower. We measured how big that effect is in our own Teleprompter’s layout (Chromium, 1280 px window, text at 80% width, October 14, 2026): a 400-word script took 49 lines at 32 px and 139 lines at 96 px, about 5.3 and 45.0 pixels of scroll per word. At a fixed pixel speed, going from the small size to the large one would cut your reading pace by a factor of about 8.5.

That is why our tool sets speed in words per minute and moves through the script word by word: in the same test it held 140 words per minute within half a word per minute at both sizes (139.5 and 140.0), and 200.0 at a 200 wpm setting. Whatever prompter you use, check its pace the simple way: time how long it takes to scroll a script whose word count you know.

Which Speed to Start With

People talk faster than they think. In a study of large English telephone-conversation corpora, Yuan, Liberman and Cieri (Interspeech 2006) counted an average of 196 words per minute over the whole conversation time, about 193 between strangers and 214 between people who know each other well, with rates by topic ranging from 152 to 170 words per minute. A read script tends to come out slower than chat, because you are articulating every word instead of trailing off, so a prompter set to conversational speed usually feels rushed.

The useful starting point is your own rate. Read the script aloud once without the prompter and time it; divide the word count by the minutes. Set the prompter a little below that number for the first take, then nudge it up. Our tool shows the word count and the run time at the chosen speed under the script box, including a short pause for each blank line, so you can match a time slot (a 60-second ad at 140 wpm holds about 140 words).

Keep Your Eyes Close to the Lens

A prompter read looks unnatural when the camera can see your eyes sweep from one side of the line to the other. How far they travel is plain geometry: half the width of the text block against your distance from it.

The fixes follow from the table. Narrow the text (60–70% width rather than the full screen), sit farther back and make the text bigger to compensate, and put the reading line in the top third of the screen, as close to the lens as you can. On a laptop, a narrow column directly under the webcam gets your eyes nearer the lens than a full-width script at the bottom of the screen.

Write the Script for the Prompter

Short sentences, one idea per line, and blank lines where you will breathe make a script easier to read aloud than it is to read on paper. Put directions you should not say in brackets, such as [smile] or [show product]: our prompter shows them as small cues and does not count them as words, and a cue on its own line or a blank line adds a pause the length of one word. Spell numbers the way you will say them (“two hundred dollars” rather than “$200”) so you do not have to translate on the fly.

Using Teleprompter Glass

A beam-splitter rig puts a sheet of glass in front of the lens at 45 degrees with the screen below it; the glass reflects the screen toward you while the camera looks straight through. The reflection is mirrored left to right, so the text has to be flipped first: turn on Mirror in the prompter (M on the keyboard). Some rigs mount the monitor upside down, which is what Flip upside down is for. Go full screen so the browser’s own bars are not reflected too.

Control the Scroll While You Read

A prompter that only scrolls at a set speed is fine for a clean read and frustrating for anything else. Our tool keeps everything on the keyboard: Space to pause and resume, the up and down arrows to change speed by 10 words per minute, the left and right arrows to jump back or forward 5 seconds of reading (at 140 wpm that moved the text 11.7 words in our test, as expected), Home to go back to the top. While paused, the mouse wheel moves through the script.

It does not follow your voice. Voice tracking needs speech recognition, and the browser’s built-in recognition sends audio to an online service in Chrome by default, according to MDN (which also documents a newer option to request on-device recognition), so the prompter runs at a steady pace you control instead and nothing leaves your device.

Frequently Asked Questions

Published Oct 14, 2026 by Derek Giordano