  RAPOC (Rosseland and Planck Opacity Converter) is a Python 3 code that
calculates Rosseland and Planck mean opacities (RPMs) from wavelength-dependent
opacities for a given temperature, pressure, and wavelength range. In addition
to being user-friendly and rapid, RAPOC can interpolate between discrete data
points, making it flexible and widely applicable to the astrophysical and
Earth-sciences fields, as well as in engineering. For the input data, RAPOC can
use ExoMol and DACE data, or any user-defined data, provided that it is in a
readable format. In this paper, we present the RAPOC code and compare its
calculated Rosseland and Planck mean opacities with other values found in the
literature. The RAPOC code is open-source and available on Pypi and GitHub.
