KCalc is part of the kdeutils package within the KDE project and will normally be provided as part of a KDE installation. For more details about KDE visit http://www.kde.org.
KCalc is part of the KDE project http://www.kde.org/.
KCalc can be found in the kdeutils package on ftp://ftp.kde.org/pub/kde/, the main FTP site of the KDE project.
In order to compile and install KCalc on your system, type the following in the base directory of the KCalc distribution:
%
./configure
%
make
%
make install
Since KCalc uses autoconf and automake you should have no trouble compiling it. Should you run into problems please report them to the KDE mailing lists.