Its a pretty nice looking program, good replacement for kconvert for example. However its a pain to install (many libraries). See http://qalculate.sourceforge.net. Thanks!
Are you serious??? * sci-calculators/qalculate-bases Latest version available: 0.9.0 Latest version installed: [ Not Installed ] Size of downloaded files: 352 kB Homepage: http://qalculate.sourceforge.net/ Description: A GTK+ base conversion tool License: GPL-2 * sci-calculators/qalculate-currency Latest version available: 0.9.0 Latest version installed: [ Not Installed ] Size of downloaded files: 353 kB Homepage: http://qalculate.sourceforge.net/ Description: A GTK+ currency converter License: GPL-2 * sci-calculators/qalculate-gtk Latest version available: 0.9.0 Latest version installed: [ Not Installed ] Size of downloaded files: 1,345 kB Homepage: http://qalculate.sourceforge.net/ Description: A modern multi-purpose calculator for GNOME License: GPL-2 * sci-calculators/qalculate-kde Latest version available: 0.9.0 Latest version installed: [ Not Installed ] Size of downloaded files: 1,439 kB Homepage: http://qalculate.sourceforge.net/ Description: A modern multi-purpose calculator for KDE License: GPL-2 * sci-calculators/qalculate-units Latest version available: 0.9.0 Latest version installed: [ Not Installed ] Size of downloaded files: 359 kB Homepage: http://qalculate.sourceforge.net/ Description: A GTK+ unit conversion tool License: GPL-2 * sci-libs/libqalculate Latest version available: 0.9.0 Latest version installed: [ Not Installed ] Size of downloaded files: 677 kB Homepage: http://qalculate.sourceforge.net/ Description: A modern multi-purpose calculator library License: GPL-2