QR code size calculator
Enter scan distance and QR content type to estimate a print-safe QR size (business cards, posters, signage). Use SVG for sharp print, keep a quiet zone, and test on real phones.
Inputs
Quick presets
Result
4.0 cm (~40 mm)
Practical range: 3.4–4.6 cm (depends on lighting, camera, and density)
- Keep a clean quiet zone (blank margin) around the QR.
- Use high contrast (dark on light) and avoid busy backgrounds.
- Test on both iPhone and Android before printing in bulk.
FAQ
Common questions
What is a good QR code size for business cards?
Start at 20–25 mm for short links. Use SVG for print and keep a clean quiet zone.
How do you calculate QR code size by distance?
A common rule-of-thumb is a 10:1 ratio: scan distance should be about 10× the QR width (e.g., 50 cm distance → ~5 cm QR).
Why do dense QRs need to be larger?
Long QR content (vCard/WiFi/long text) increases module density, making small prints harder to scan.
How do I make a QR scan more reliably?
Use high contrast, keep a quiet zone, avoid busy backgrounds, and test on both iPhone and Android before printing.