  The dust mass of the well-known supernova remnant (SNR) IC 443 is estimated
from both the infrared emission and the visual extinction. With photometry to
the images taken by \emph{Spitzer}, \emph{WISE}, \emph{IRAS}, \emph{AKARI} and
\emph{Planck}, the spectral energy distribution (SED) of the dust is obtained
after subtracting the synchrotron radiation and considering the spectral line
emission. The dust mass is derived from fitting the SED by a two-component
model, which results in a warm component of the temperature of $\sim$ 53 K and
the mass of 0.1 $M_\odot$, and a cold component of the temperature of $\sim 17$
K and the mass of 46 $M_\odot$. On the other hand, the dust mass is derived to
be $\sim$ 66 $M_\odot$ from the visual extinction of IC 443 which is identified
from the 3D Bayestar extinction map and its coincidence with the infrared
emission morphology. Roughly the dust mass derived from the infrared emission
and the extinction agree mutually. However, the dust mass derived from the
infrared emission can be adjusted to be more consistent with that from the
extinction by using different dust opacity property or considering optically
thick radiation. In addition, the distribution of dust temperature and mass is
analyzed by fitting the SED pixel by pixel.
