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Plan how large a QR code should be before it goes on a sign, label, or poster.
Recommended minimum
12.0 cm4.7 inUse the QR size calculator before artwork goes to print. A code that looks fine in a browser can be too small on a door sign or too dense for a tiny product label.
Use the 10:1 rule as a starting point: scan distance divided by 10 equals the minimum QR width. A code scanned from 30 cm should be around 3 cm wide. Add more size for dense data, a logo, rough material or poor lighting.
Often yes. A logo covers part of the symbol, so use high error correction and add physical size. If a plain code works at 3 cm, a logo version may deserve 3.5-4 cm in the same setting.
Always. A QR code that scans on your monitor can fail after resizing, printing, coating, or placing it under poor lighting.
For raster artwork, aim for 300 DPI at the final printed size. A 3 cm QR code needs roughly 355 pixels across at 300 DPI, but exporting larger is fine. SVG stays sharp because it is vector artwork.
More data creates more modules. A very simple QR might be 21 by 21 modules, while a dense one can be 57 by 57 or more. Smaller modules are harder for cameras and printers to resolve.
No, but the 10:1 scan-distance rule is a useful starting point. As rough minimums, use about 2 cm for a business card, 3 cm for a table card and 5 cm or more for a wall sign. Dense QR versions need more room because they have more modules.
Do not go below about 2 cm (0.8 inches) for close range scanning. Below that size, most phone cameras struggle to focus on the individual modules, especially if the code is dense or the lighting is poor.
Divide the scanning distance by 10 to get a starting minimum. A code scanned from 50 cm needs to be at least 5 cm wide. Add 20 to 30 percent extra for safety if the environment has low light, glare, or heavy foot traffic.
Use 300 DPI for business cards, labels, and flyers. For large format prints like posters and banners, 150 DPI is usually enough because people view them from farther away. When possible, export as SVG so the file stays sharp at any size.
Avoid custom QR colors that look stylish but scan poorly.
Prepare QR codes for label-style printing and repeated physical placement.
Make a clean QR flyer for counters, walls, events, and handouts.
Design a folded table tent with QR panels for restaurants, events, and service desks.