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Home/ Questions/Q 6767007
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Editorial Team
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Editorial Team
Asked: May 26, 20262026-05-26T14:53:59+00:00 2026-05-26T14:53:59+00:00

How can I convert a double-precision hexadecimal back into a double? For example, given

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How can I convert a double-precision hexadecimal back into a double?

For example, given the string '4045000000000000', how do I get back to the double 42.0?

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  1. Editorial Team
    Editorial Team
    2026-05-26T14:54:00+00:00Added an answer on May 26, 2026 at 2:54 pm

    Pack the hexadecimal into bytes and unpack them as a double:

    ['4045000000000000'].pack("H*").unpack("G").first # => 42.0
    
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