How do I calculate the right QR code size?

Use the 10:1 ratio rule: divide your scanning distance by 10. For example, if people scan from 5 feet (60 inches) away, your QR code should be at least 6 inches. This ensures reliable scanning across all devices.

What's the minimum QR code size for business cards?

The minimum is 0.4 inches (1 cm), but 0.8 inches (2 cm) is recommended for business cards. This ensures reliable scanning from 6-8 inches away and works with all modern smartphones.

Does QR code size affect data capacity?

No, size doesn't affect how much data a QR code can hold. A 1-inch QR code holds the same amount of data as a 10-inch code. However, larger codes are easier to scan from greater distances.

What DPI should I use for printing QR codes?

Use 300 DPI for business cards and flyers, 150 DPI for banners, and 72-100 DPI for billboards. Higher DPI ensures crisp, scannable codes, especially at smaller sizes.

Free Animated QR Code Generator

Quick Size Reference

Business Cards: 0.8" (scanning distance: 6-8")

Flyers: 2" (scanning distance: 1-2 feet)

Posters: 3" (scanning distance: 3-6 feet)

Banners: 8" (scanning distance: 10-20 feet)

Billboards: 20-40" (scanning distance: 50-100+ feet)

Choosing the right QR code size is critical for scannability. Too small and phones can't focus properly. Too large and the code won't fit in the camera frame. This guide shows you how to calculate the perfect size for any use case.

The 10:1 Ratio Rule

The fundamental principle for QR code sizing is the 10:1 ratio:

Scanning Distance ÷ 10 = Minimum QR Code Size

Examples

6 inches away: 6 ÷ 10 = 0.6" QR code
2 feet (24") away: 24 ÷ 10 = 2.4" QR code
5 feet (60") away: 60 ÷ 10 = 6" QR code
50 feet (600") away: 600 ÷ 10 = 60" QR code

Size Calculator by Use Case

Business Cards

Scanning Distance: 4-8 inches
Minimum Size: 0.4" (1 cm)
Recommended Size: 0.8" (2 cm)
Maximum Size: 1.2" (3 cm)
DPI: 300-600 DPI

Flyers and Brochures

Scanning Distance: 1-2 feet
Minimum Size: 1.2" (3 cm)
Recommended Size: 2" (5 cm)
Maximum Size: 3" (7.5 cm)
DPI: 300 DPI

Posters

Scanning Distance: 3-6 feet
Minimum Size: 2" (5 cm)
Recommended Size: 3" (7.5 cm)
Maximum Size: 5" (12.5 cm)
DPI: 300 DPI

Store Windows

Scanning Distance: 5-10 feet
Minimum Size: 4" (10 cm)
Recommended Size: 6" (15 cm)
Maximum Size: 10" (25 cm)
DPI: 150-300 DPI

Banners

Scanning Distance: 10-20 feet
Minimum Size: 6" (15 cm)
Recommended Size: 8" (20 cm)
Maximum Size: 12" (30 cm)
DPI: 150 DPI

Billboards

Scanning Distance: 50-100+ feet
Minimum Size: 12" (30 cm)
Recommended Size: 20-30" (50-75 cm)
Maximum Size: 40" (100 cm)
DPI: 72-100 DPI

Use Our QR Code Size Calculator

Enter your scanning distance and get instant size recommendations with DPI requirements. Perfect for any print project!

Open Calculator →

Print Resolution (DPI) Requirements

QR Code Size	Minimum DPI	Recommended DPI	Use Case
0.4" - 1"	300 DPI	600 DPI	Business cards, labels
1" - 4"	300 DPI	300 DPI	Flyers, posters
4" - 12"	150 DPI	300 DPI	Banners, signs
12" - 40"	72 DPI	150 DPI	Billboards, large format

Factors That Affect Size Requirements

1. Data Complexity

More data = more modules = larger recommended size:

Simple URL (20 chars): Standard size
Long URL (50 chars): Add 10-20%
vCard or WiFi: Add 20-30%
Large text blocks: Add 30-40%

2. Error Correction Level

Higher error correction adds modules:

Level L (7%): Standard size
Level M (15%): Recommended, standard size
Level Q (25%): Add 10%
Level H (30%): Add 15%

3. Lighting Conditions

Good lighting: Standard size
Low light: Add 20%
Outdoor/variable: Add 15%
Backlit: Add 25%

4. Viewing Angle

Straight on: Standard size
Slight angle: Add 10%
Steep angle: Add 20-30%

Digital Display Sizes

For screens and digital displays, use these pixel dimensions:

Email Signatures: 150x150 to 200x200 pixels
Website Sidebar: 200x200 to 300x300 pixels
Mobile Apps: 300x300 to 400x400 pixels
Social Media: 400x400 to 600x600 pixels
Presentations: 500x500 to 800x800 pixels
Digital Signage: 800x800 to 1200x1200 pixels

Testing Your QR Code Size

Before mass production, always test:

Print Test Copy: Print at actual size on target material
Test Distance: Scan from expected distance
Multiple Devices: Test iPhone, Android, older phones
Lighting Conditions: Test in bright, dim, and outdoor light
Angles: Test from different viewing angles
Speed Test: How quickly does it scan?

Common Sizing Mistakes

Too Small: Under 0.4" rarely scans reliably
Wrong Aspect Ratio: QR codes must be square (1:1)
Stretched or Distorted: Never stretch, always scale proportionally
Low Resolution: Blurry codes won't scan
No Quiet Zone: Need white border (4 modules minimum)
Poor Contrast: Ensure dark modules on light background
Ignoring Distance: Not considering actual scanning distance

Industry-Specific Recommendations

Retail & E-commerce

Product packaging: 0.8-1.2"
Shelf tags: 1-1.5"
Store displays: 4-6"
Window clings: 6-8"

Events & Hospitality

Event tickets: 1-1.5"
Table tents: 2-3"
Event banners: 8-12"
Badges: 0.8-1"

Real Estate

Yard signs: 6-8"
Window displays: 8-12"
Brochures: 2-3"
Business cards: 0.8"

Transportation

Bus stops: 6-8"
Vehicle wraps: 12-18"
Transit ads: 4-6"
Tickets: 1-1.5"

Quick Reference Chart

Distance	Minimum Size	Recommended	Common Use
4-8"	0.4"	0.8"	Business cards
1-2 ft	1.2"	2"	Flyers
3-6 ft	2"	3"	Posters
5-10 ft	4"	6"	Store windows
10-20 ft	6"	8"	Banners
50-100 ft	12"	20-30"	Billboards

Conclusion

The right QR code size depends on scanning distance, print medium, data complexity, and environmental factors. Use the 10:1 ratio as your starting point, never go below 0.4 inches, and always test before mass production. When in doubt, go slightly larger—it's better to be too big than too small.

QR Code Size Calculator: Print Perfect Codes (2026)