QR Code Maximum Scan Distance
Find out how far away a QR code can be scanned based on its print size. Use this guide to plan posters, signs, menus, outdoor displays, retail packaging, digital screens, and billboards.
Scan Distance Formula
The maximum distance a QR code can be scanned depends mainly on its physical height. Use these rules:
- • Indoor scanning: Max Distance ≈ QR Height × 10
- • Outdoor scanning: Max Distance ≈ QR Height × 8
These ratios are used by signage designers, public display engineers, and retail advertisers to guarantee reliable scanning at a glance.
Real-World Examples
Indoor Poster (6 inches)
6 inches × 10 = 60 feet max scan distance.
Outdoor Window Sign (8 inches)
8 inches × 8 = 64 feet max scan distance.
Large Event Banner (12 inches)
12 inches × 10 = 120 feet max scan distance.
Billboard (24 inches QR)
24 inches × 10 = 240 feet max scan distance.
Factors That Reduce Scan Distance
- • Low lighting or shadows
- • Glare on glossy surfaces
- • Fast-moving pedestrians or vehicles
- • Dirty, wrinkled, or faded prints
- • Overly dense QR code content
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