QR Code Size for Screens, Presentations & TVs
Putting a QR code on a slide or TV is easy. Making it scannable from the back row is the hard part. Use these distance and pixel rules so your audience isn’t squinting or frustrated.
Quick Answer: How Big Should It Be?
A safe rule for QR codes on screens is:
QR Code Height ≈ Viewing Distance ÷ 10
If the back row is 30 ft away, the QR code should be about 3 ft tall on the projected image. For smaller conference rooms, aim for a QR that takes up at least 10–15% of the screen height.
On digital displays, think in both physical size and pixels. Blurry upscaled images are much harder to scan.
Use the Distance-Based Size Calculator
For conference rooms, auditoriums, and digital signage, use our minimum QR code size calculator based on viewing distance.
Minimum QR Code Size CalculatorRemember that projectors reduce contrast and sharpness. If your slides look slightly fuzzy, give your QR codes extra size.
Recommended QR Code Sizes by Screen Type
Small Meeting Room
Screen distance: 6–12 ft
QR size: at least 10–15% of screen height.
On a 1080p slide, use at least a 256×256 pixel QR image.
Conference Room / Classroom
Back row: 20–40 ft away
QR size: 15–25% of screen height.
Use 512×512 pixels or higher to keep the modules sharp when scaled.
TVs & Digital Signage
Viewing distance varies (5–20 ft). Use the distance rule and keep the QR code clean and isolated.
For 4K screens, a 512–1024 px QR is often ideal.
Design Tips for Screen-Based QR Codes
Maximize Contrast
Dark QR code on a light, solid background works best. Avoid gradients behind the code.
Limit On-Slide Clutter
When showing a QR, keep text and graphics minimal. Let the QR and CTA dominate the slide.
Use a Clear CTA
“Scan to download slides,” “Scan to register,” or “Scan for menu” gives people a reason to pull out their phone.
Show It Long Enough
Leave the QR on screen for at least 10–20 seconds so people have time to open their camera and scan.
Common QR Code Mistakes on Screens
- • Making the QR code tiny in the corner of a busy slide.
- • Showing the QR for only a couple of seconds.
- • Using low-resolution QR images that blur when scaled.
- • Projector brightness too low or washed-out colors.
- • Not testing from the back of the room.
- • Placing multiple QR codes on the same slide.
Create Presentation-Ready QR Codes
Generate dynamic QR codes you can reuse across slides, webinars, and digital displays.
Generate a QR CodeRelated Guides
Distance-based rules for print and screens.
Indoor poster sizing.
Tips for campaigns that actually get scans.