The results shown by the QR cow calculator are the bare minimum size required to function based on the audience you are trying to reach. The size shown is for the black modules that form the code, and does not include the white safety (as that safety can vary depending on how the code was generated).

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Step 1: Identify your QR Code Version

Not all QR codes are the same. The complexity of the pattern in a QR code will impact how small that code can be.

The version number of a QR code indicates how complex the code is (with 1 being the simplest). Use the handy version reader below the size calculator to find your QR version number, or learn how to count the modules here.

Step 2: Scanning Distance

You need to put yourself in your audiences shoes – how far will they realistically be scanning from? How close would you get?

• Packaging? Probably 6 inches as they hold it.
• A flyer? Maybe 12 inches to the kitchen counter?
• A store window sign? Could be 3-6 feet or more.

Step 3: Contrast

If your QR code is black and white (or really close to it) – leave as is. Otherwise switch to “low contrast”. A lower contrast QR code is harder for a scanner to read, so it needs to be bigger. However, with endless color combinations there is no way to guarantee an exact size. The size given is an estimate based on average testing in the wild.

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For more details see the FAQ.