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A browser-based qr code print size & scan distance calculator tool. No data sent to server.

📘 How to Use

  1. Set the expected scanning distance in centimeters.
  2. Specify the character length of the URL.
  3. Choose an error correction level (L, M, Q, or H).

QR Code Print Size & Scan Distance Calculator

Ex: Business Card=30cm, Poster=200cm, Billboard=500cm

*Include tracking parameters if any

warning Disclaimer & Notes
  • These values are estimates based on general smartphone camera performance.
  • Print quality may vary depending on material, potentially affecting scanning.
  • Always perform a scan test with actual printed material before mass production.
  • Module size ≥ 0.25mm and total size ≥ 15mm is strongly recommended.

QR Code Size Specification

Recommended minimum physical printing dimensions for optimal scanning

20.5 mm
Recommended Min Size
20.5 mm
(Module Size: 0.6 mm)
Scan Distance 30 cm
URL Length 50 chars
Error Correction M (15%)
QR Version V3
Grid Format 29×29
*Always test print before mass production

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Article

QR Code Print Size Calculator｜Ensure Scannability for Any Distance

This tool calculates the minimum recommended physical size for a QR code to ensure it's scannable from a specific distance. It's designed for marketers, designers, and developers who need to print reliable QR codes on anything from small business cards to large billboards.

💡 Tool Overview

  • Calculate Optimal Size: Automatically determines the minimum required print size based on the intended scanning distance, URL length, and error correction level.
  • Versatile Use Cases: Whether for a product package scanned from 30cm or a poster viewed from 5 meters, this calculator provides the necessary dimensions for reliable performance.
  • Technical Specification Output: Generates a clear specification sheet showing the recommended size, module size, QR version, and grid format.
  • Download as Image: Export the complete specification sheet as a PNG image, perfect for sharing with design teams or printers to ensure accurate implementation.

🧐 Frequently Asked Questions

Q. What is "Error Correction Level"?

A. It's a feature of QR codes that allows them to be scanned even if a part of the code is damaged or obscured. There are four levels: L (Low, ~7% recovery), M (Medium, ~15%), Q (Quartile, ~25%), and H (High, ~30%). A higher level allows for more data recovery but increases the QR code's density (more dots), which may require a larger print size. For most commercial uses, Level M is a safe and common choice.

Q. What do "Module Size" and "QR Version" mean?

A. Module Size refers to the dimension of a single black or white square within the QR code grid. A larger module size makes the code easier for cameras to read, especially from a distance. This tool ensures the module size is adequate for the specified scan distance, with a strong recommendation of at least 0.25mm. QR Version determines the data capacity of the code, which is reflected in its grid size (e.g., Version 1 is 21x21 modules, Version 3 is 29x29). A longer URL requires a higher version, resulting in a more complex and dense QR code.

📚 Fun Facts: The "10:1 Rule" for QR Code Sizing

A common rule of thumb for QR code sizing is the "10:1 Rule," which states that the scanning distance should be roughly 10 times the width of the QR code. For example, a QR code that needs to be scanned from 1 meter (100 cm) away should be at least 10 cm wide. While this is a useful starting point, it doesn't account for a critical factor: data density.

A QR code containing a long URL is much denser than one with a short URL, making it harder for a camera to distinguish the individual modules. This is where our calculator shines. By considering the URL length (which determines the QR Version) and the error correction level, it provides a more precise and reliable size recommendation than the simple 10:1 rule, ensuring your code works flawlessly in the real world.