Lobby wayfinding kiosk setup: what size screen you need

What size screen does a lobby wayfinding kiosk need?

For a typical entrance lobby where the farthest standing reader is about 8 ft away, a 32-inch portrait touch panel is the right size. A 50-inch board only pays off when readers stand 20 ft or more from the screen.

The size comes from the farthest reader, and the farthest reader in an entrance lobby stands at the doors or the elevator bank, usually 6 to 12 ft from the panel. Anyone who wants directions walks up to 2 or 3 ft to touch the screen. That splits the design in two: text sized for the distant first look, taps happen at arm's length. A 50-inch interactive board is built for the opposite case, an agenda wall read across a room. In a lobby it spends most of its glass on pixels nobody uses from the door. The general process of sizing and picking a touch wayfinding screen covers panel types, touch options and mounts; this page stays on the lobby numbers.

How do you calculate letter height from viewing distance?

Divide the farthest reader's distance in feet by 20 to get capital letter height in inches. That means 8 ft needs 0.4 in capitals, 15 ft needs 0.75 in, and 20 ft needs 1 in, the fast-reading planning case from FHWA legibility research.

The 20 ft per inch figure comes from Federal Highway Administration legibility work; 30 ft per inch is the unhurried case. A room directory is scanned quickly, so plan on 20. In metric, 1 in of capitals covers 20 ft, and 20 ft is 6.1 m, so capitals in mm equal the distance in metres multiplied by 4.2, rounded up. Set line spacing at 1.7 times capital height. Give the header and the map labels the same capital height as the list, because visitors read those from the same spot. The screen size and viewing distance guide runs the same math for menu boards and office screens.

Which portrait panel size covers which lobby distance?

A 32-inch portrait panel serves readers up to about 13 ft, 43 inches up to about 18 ft, and 50 inches up to about 21 ft. That keeps a six-room directory inside the bottom quarter of a 1080 × 1920 portrait screen.

The limit comes from one rule: the six-room directory stays inside the bottom quarter of the screen and the floor plan keeps the rest. A 16:9 panel stood on its long edge stands 0.872 times its diagonal tall, so the bottom quarter is 0.218 times the diagonal. Six rows at 1.7 times spacing take 10.2 times the capital height, and the capital height is the distance divided by 20. Setting the two equal gives the serving distance: 0.43 times the diagonal, in feet.

Pick something else in three cases. Past ten rooms per view, split the directory by floor or move up a size. When the panel also plays announcements read from across the lobby, the farthest reader is the one across the lobby, so size for 20 ft and up. Narrow millwork that only fits a small panel is a reason to change the mounting, because the text rule does not shrink with the joinery.

Worked example: what fits on a 32-inch panel at 8 ft?

At 8 ft the reader needs 0.4 in capitals, which a 32-inch portrait panel at 1080 × 1920 shows as 28 px. A six-room list takes 288 px and the floor plan keeps the other 85 percent of the screen.

The arithmetic, step by step:

• Capitals: 8 ÷ 20 = 0.4 in, which is 10 mm.
• Panel height: 0.872 × 32 in = 27.9 in, so the pixel pitch is 27.9 ÷ 1920 = 0.0145 in.
• Capitals in px: 0.4 ÷ 0.0145 = 27.6, round to 28 px.
• Row pitch: 1.7 × 28 = 48 px, which is 48 × 0.0145 = 0.70 in of glass per row, a comfortable tap row.
• Six rows: 6 × 48 = 288 px, and 288 ÷ 1920 = 15% of the screen.
• The header takes 28 px capitals of its own, and the floor plan takes the remaining 85%.

Everything on the glass clears the 8 ft bar and the list sits in the bottom sixth of the screen. A 21.5-inch portrait passes the same test with the list at 22% of the screen. But it shares the remaining 78% among header, search field and map on an 18.7 in face; the 32-inch panel is where all of that stops feeling tight.

How high should you mount a touch kiosk screen?

Keep every control visitors touch between 15 and 48 inches above the floor. That is the reach range in the ADA standards for unobstructed access. Set the bottom edge of the panel about 30 inches off the floor.

That band covers standing adults and seated wheelchair users reaching a screen with a clear approach. With the bottom edge at 30 inches, the interactive rows land inside it on every size in the table: 30 to 37 in on the 32-inch, 30 to 39 in on the 43-inch, 30 to 41 in on the 50-inch. The top of the panel climbs past the band, 58 in on the 32-inch and 74 in on the 50-inch. That is fine as long as what sits up there is look-only floor plan. Put nothing a visitor must tap above 48 inches.

How do you put emergency exits on a wayfinding kiosk?

Give the exit plan a permanent button on the main screen and draw every exit route on it. Exit routes are kept as far apart as practical so a fire or smoke blocking one route leaves the others usable, which is why the exit slide shows every route, not only the nearest door.

Draw the plan full screen, mark the you-are-here point, and label each route. Size its capitals for the same farthest reader, 0.4 in at an 8 ft lobby. Keep the button permanent, at least 0.5 in tall, inside the bottom quarter of the screen so it stays in the 15 to 48 inch band, and confirm the lockdown shell leaves it reachable. An exit map hidden two swipes deep is the failure mode this design exists to prevent.

Which software draws the map and locks the screen?

Two pieces of software are involved: the wayfinding application that renders your floor plan and room list, and a kiosk lockdown that keeps visitors inside it. The lockdown setup is covered step by step in our wayfinding kiosk software walkthrough.

If the meeting rooms are booked in one platform, ask that vendor first whether its signage client renders a floor plan with tappable rooms on a portrait canvas. It should also be designed to start itself after a power cut. If it does, the kiosk is one panel running one app. If it does not, run a dedicated signage player with wayfinding software on the panel; the room list is a picture you update, unless you specifically want live availability from the booking system. Either way the lockdown is its own job: pinning the app, hiding system gestures, and auto-starting on power-up. Our walkthrough of building the map and running it locked covers those settings.

What should you ask for before you order?

Ask for six things in writing: capacitive touch, portrait orientation in the panel and the software, the brightness option that matches the wall, the mounting detail, the auto-start behaviour, and lead time and warranty on the quote.

Screen

• Capacitive touch, because it survives the wiping a public screen gets.
• Portrait orientation supported by both the panel and the software canvas.
• Brightness matched to the wall: a shaded lobby wall suits the standard indoor class, a wall facing entrance glass needs the high-brightness option. The in-store kiosk brightness decision covers the numbers for shop-floor light.

Mounting and power

• A flush cut-out drawing from the millworker, or a surface arm with the cable exiting behind the panel.
• One power drop behind the panel, and a network drop if the show updates over the network.

Software and commercial

• Lockdown with auto-start, so a morning power-up lands on the map with the exit button present.
• If the panel comes from a quoted range like ours, the quote confirms software, ports, power, orientation, rating, lead time and warranty in writing; our larger wall displays run through 75 inches and are quoted per project. Browse the display range and our lobby displays before you shortlist.

Recommendation: For the common entrance lobby read from 8 ft, order a 32-inch portrait capacitive touch panel. Mount it with the bottom edge at 30 inches, put the six-room list in the bottom quarter, and put the full-screen exit plan behind a permanent button in that same quarter. Step up to 43 inches when the farthest standing reader passes about 18 ft, and to 50 inches only when the board is also read across the lobby from 20 ft or more.

Questions