How to Print QR Codes: DPI, Sizing, Paper & Distance Formula

Printing a QR code requires balancing physical size, scanning distance, printer resolution (DPI), and paper stock. Use this practical formula to guarantee seamless scanning every time.

The 10:1 Scanning Distance Rule of Thumb

As a general rule of thumb for standard website URLs: ``` Minimum QR Width = Scanning Distance / 10 ```

• **Business Card / Flyer** (Scanned from 20 cm / 8 inches away): Minimum width = **2 cm (0.8 inches)**.
• **Table Tent / Menu** (Scanned from 40 cm / 16 inches away): Minimum width = **4 cm (1.6 inches)**.
• **Wall Poster / Banner** (Scanned from 2 meters away): Minimum width = **20 cm (8 inches)**.
• **Billboard** (Scanned from 10 meters away): Minimum width = **1 meter (39 inches)**.

*Note: For dense payloads like vCards or long calendar events, increase the minimum size by 30-50% to account for the smaller individual module sizes.*

DPI and Pixel Calculations

Commercial printers require **300 DPI** (dots per inch) for crisp, professional results: - A 2 x 2 inch QR code at 300 DPI needs a raster image of **600 x 600 pixels**. - A 4 x 4 inch table tent at 300 DPI needs a raster image of **1200 x 1200 pixels**.

With QR Studio, you can export up to 2048px raster PNGs or infinite-resolution vector SVGs that scale to any billboard size without loss of sharpness.

Test Before You Print! Always print a single test proof on your target printer, hold it at the intended viewing distance, and scan it with both an iPhone and an Android phone before producing a mass print run.