bc & dc
dc are the 2 calculators that I'll often use when needing access from a terminal.
Copyright 1991-1994, 1997, 1998, 2000, 2004, 2006 Free Software Foundation, Inc.
This is free software with ABSOLUTELY NO WARRANTY.
For details type `warranty'.
Then you can type your questions:
When you're done you can get out with a Ctrl+C.
These calculators are pretty feature rich.
193 * 1/3
ir = 0.05
years = 5
futurevalue = principal * (1 + ir)^years
If you want something a little more interactive there's
C-style arbitrary precision calculator (version 22.214.171.124)
Calc is open software. For license details type: help copyright
[Type "exit" to exit, or "help" for help.]
You can use the up/down arrows to go through past commands and it also has interactive help.
Gives you this:
For more information while running calc, type help followed by one of the
intro introduction to calc
overview overview of calc
help this file
assoc using associations
builtin builtin functions
command top level commands
config configuration parameters
custom information about the custom builtin interface
define how to define functions
environment how environment variables effect calc
errorcodes calc generated error codes
expression expression sequences
file using files
history command history
interrupt how interrupts are handled
list using lists
mat using matrices
See the man page for more info.