码叮QRDIV
QR code size calculator

QR Code Size Calculator

Calculate the minimum print size from scanning distance using the 10:1 rule, with an automatic safety margin.

QRDIV's QR code size calculator uses the 10:1 rule — dividing the scanning distance by 10 to get the minimum print size — then adds a 20–30% margin automatically; it also offers presets for business cards, posters, billboards and more, plus quiet-zone and contrast tips.

01

Size by scanning distance (10:1)

Enter a scanning distance or pick a preset to get the recommended print size instantly.

Preset
Scan distance（cm）
Safety margin · 25%
Content complexity (optional)
Recommended size
Enter a scan distance to calculate instantly
04 · 05

What's the minimum size? Print resolution tips

A common rule of thumb is "10:1": the QR side length is about one-tenth of the maximum scanning distance. In practice, don't go below 2cm; the more data and the denser the modules, the larger it should be. Print at 300 DPI or higher, keep the quiet zone, and ensure contrast so it really scans once printed.

10:1 ruleSide ≈ scan distance ÷ 10.
2cm floorDon't go below 2cm even at close range.
300 DPIPrint at ≥ 300 DPI for sharper results.
Keep the quiet zoneLeave a ≥ 4-module blank border on all sides.
FAQ

FAQ

It depends on scanning distance and data volume. By the 10:1 rule the side is about one-tenth of the distance; in practice, don't go below 2cm, and the more data, the larger it should be.