QR Placement Size Calculator
Calculate minimum QR size for your scan distance.
About QR Placement Size Calculator
Use this calculator to estimate how large your QR code should be for reliable scanning at a given distance. It applies the widely used 10:1 sizing rule and suggests an error correction level based on your medium.
How to use
- Pick a medium (business card, poster, or billboard).
- Enter the expected scan distance.
- Use the minimum size as a baseline, then test and adjust upward if needed.
Error correction
Error correction helps QR codes remain scannable if they are scratched, slightly blurred, or partially covered. Higher levels improve tolerance but can make the code more complex. If you add a logo or plan for outdoor wear, consider a higher level and a slightly larger size.
Privacy
Calculations run in your browser and are not stored.
FAQ
How do I calculate the minimum QR code size?
A common rule of thumb is the 10:1 ratio: the QR code should be about 1 unit wide for every 10 units of scanning distance.
Do I need white space around the QR code?
Yes. Include a quiet zone (blank margin) around the code so scanners can detect the edges reliably.
Which error correction level should I use?
Higher error correction tolerates damage and logos but adds complexity. Smaller prints (like business cards) often benefit from higher levels.
Does medium change the size recommendation?
Scan distance drives minimum size. The medium mainly affects print quality, contrast, and the best error correction level to use.
Should I make the QR code bigger than the minimum?
Usually, yes. The minimum is a baseline. Going slightly larger improves scan reliability in glare, low light, or imperfect printing.
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