qalc
Powerful and easy to use command-line calculator.
TLDR
Launch in [i]nteractive mode
$ qalc [--interactive]
Launch in [t]erse mode (print the results only)
$ qalc --terse
Update currency [e]xchange rates
$ qalc --exrates
Perform calculations non-interactively
$ qalc [66+99|2^4|6 feet to cm|1 bitcoin to USD|20 kmph to mph|...]
List all supported functions/prefixes/units/variables
$ qalc --[list-functions|list-prefixes|list-units|list-variables]
Execute commands from a [f]ile
$ qalc --file [path/to/file]
