1.2 kilobytes = 9.6 kilobits. If you need 61 bits per line, you’ve got enough bi... | Hacker News

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		tzs on Dec 30, 2019 \| parent \| context \| favorite \| on: Encoding your WiFi access point password into a QR... 1.2 kilobytes = 9.6 kilobits. If you need 61 bits per line, you’ve got enough bits for 157 lines. 393 lines if we go with 3 kilobytes. I think you may have used 61 bytes per line in your calculation rather than 61 bits.

colejohnson66 on Dec 31, 2019 [–]

I (not OP) would say bytes would be closer. The product name could be 20 characters long (20 bytes minimum)

tzs on Dec 31, 2019 | [–]

OP was assuming the receipt would list the product UPC code rather than product name. A UPC code is 12 digits, which can be encoded in 40 bits.

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