Optimal QR Code Sizing
Perfect Dimensions for Every Medium & Distance
Master the science of QR code sizing with proven formulas and guidelines. Learn how to calculate perfect dimensions for print, digital, and display media to ensure optimal scanability at any distance.
Sizing Guidelines by Medium
Different media require different sizing approaches. Follow these proven guidelines to ensure optimal scanability across all platforms.
Print Media Sizing
Optimal dimensions for business cards, flyers, posters, and other printed materials.
- Business cards: Minimum 0.8 inches (2cm) square
- Flyers & brochures: 1-2 inches (2.5-5cm) square
- Posters: 2-4 inches (5-10cm) square
- Large format: Scale proportionally to viewing distance
Digital Display Sizing
Perfect pixel dimensions for websites, apps, and digital screens.
- Web pages: 150-300 pixels square minimum
- Mobile apps: 100-200 pixels for touch targets
- Digital signage: 300-600 pixels depending on distance
- Email signatures: 100-150 pixels square
Distance Calculations
Size your QR codes based on expected viewing and scanning distances.
- Arm's length (2 feet): 0.8-1 inch minimum
- Reading distance (3 feet): 1-1.5 inches
- Presentation distance (6 feet): 2-3 inches
- Signage distance (10+ feet): 4+ inches
Mobile Optimization
Ensure perfect scanning across all mobile devices and camera capabilities.
- Consider camera resolution limitations
- Account for hand shake and movement
- Test with older device cameras
- Ensure minimum 21x21 module visibility
Size Examples by Use Case
See real-world examples of optimal QR code sizing for different applications and contexts.
Business Cards
Perfect for professional networking
Close-range scanning, professional settings
Flyers & Brochures
Balanced visibility and space usage
Marketing materials, information sharing
Posters
Visible from moderate distances
Event promotion, public displays
Digital Screens
Optimized for screen viewing
Websites, apps, digital signage
Size Calculation Formulas
Use these proven formulas to calculate the perfect QR code size for any situation or medium.
Basic Size Formula
QR Size = Viewing Distance ÷ 10General rule for minimum readable size
Example: 3 feet viewing distance = 0.3 inch minimum QR code
Print Resolution Formula
Pixel Size = Inches × DPIConvert physical size to digital resolution
Example: 1 inch at 300 DPI = 300 × 300 pixels
Scanning Distance Formula
Max Distance = QR Size × 10Maximum effective scanning distance
Example: 2 inch QR code = 20 feet maximum distance
Common Sizing Mistakes
Avoid these common pitfalls that can significantly impact QR code scanability and user experience.
Too Small for Distance
QR code too small for intended viewing distance
Solution:
Use distance formula to calculate minimum size
Impact:
Scanning failures, user frustration
Inconsistent Scaling
Different sizes across similar materials
Solution:
Establish size standards for each medium
Impact:
Brand inconsistency, confusion
Ignoring Resolution
Low resolution causing pixelation
Solution:
Use vector formats or high-resolution images
Impact:
Poor scanability, unprofessional appearance
No Testing
Not testing actual scanning at intended distance
Solution:
Test with real devices at actual distances
Impact:
Real-world scanning problems
Quick Reference Guide
Print Media Sizes
Digital Sizes
Start Sizing Perfectly
Ready to create perfectly sized QR codes? Apply these guidelines and formulas to ensure optimal scanability in every situation.
Measure Distance
Determine the expected viewing and scanning distance.
Calculate Size
Use our formulas to determine optimal dimensions.
Test & Verify
Test scanning at actual distances with real devices.