Hexadecimal String to Double Conversion in MATLAB (hex2num)

By RF Wireless Expert Team

Last Updated: August 25, 2026

This article provides MATLAB source code for converting a hexadecimal string to a double-precision number, effectively implementing the hex2num function. The provided code converts a hexadecimal string (up to 16 characters) into a double-precision floating-point number according to the IEEE standard. Input strings shorter than 16 characters are padded with zeros on the right.

Example:

input = 'FCDE';
output = hex2num(input)

Output:

output = -2.9938e+293

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Hexadecimal String to Double Conversion in MATLAB (hex2num)

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