What is the minimum QR code size for printing?

The minimum recommended size is 2×2cm (about 0.8×0.8 inches) for handheld scanning at 30cm distance. Use the 10:1 rule: QR size should be at least 1/10th of the expected scanning distance.

What DPI should I use for printing QR codes?

Use 300 DPI for standard printing like business cards and flyers. For large format printing like banners and billboards, 72-150 DPI is sufficient. Screen display typically uses 72-96 DPI.

What is the quiet zone in a QR code?

The quiet zone is the white border around a QR code. ISO standard requires at least 4 modules of quiet zone. Without adequate quiet zone, scanners may fail to detect the QR code boundaries.

How does scanning distance affect QR code size?

The 10:1 rule states that a QR code should be at least 1/10th of the scanning distance. For example, if people will scan from 1 meter away, the QR code should be at least 10cm wide.

Size Calculator

Calculate perfect QR size for reliable scanning at any distance

Quick Presets

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10:1 Rule — Interactive

Minimum QR size = Scan distance ÷ 10. Slide to see the relationship.

Scan Distance: 1 m

10cm5m10m

10.0cm

Min QR Size

15.0cm

Recommended

Calculate Pixels from Print Size

Target Print Size

Print Resolution (DPI)

💡 300 DPI is standard for print. Use 72-96 for screens.

Preview (not to scale)

Results

591px

Required Size

33×33

14.41px

Per Module

100%

Scan Success

Estimated Scan Success Rate100%

Excellent module size (14.41px). QR code will scan reliably.

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Quick Reference

Use Case	Size	Distance	300 DPI
Business Card	20mm	30cm	236px
Product Label	25mm	40cm	295px
Flyer/Menu	30mm	50cm	354px
Small Poster	50mm	1m	591px
Large Poster	100mm	2m	1181px
Banner	200mm	5m	2362px

QR Generator

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QR Decoder

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