Free calculator program software for linux

BMI Calculator is a simple, easy-to-use BMI calculator. It accepts input in both the English and Metric measuring systems.
BMI Calculator uses an HTML template that can be easily customized. The degree of health risk associated with every calculated BMI is also determined.
Enhancements:
- Fixed the script to work with register_globals = Off
- Stopped returning by reference results in interpret_bmi function

PG Calculator is a powerfull scientific skinable calculator. PG Calculator is an excellent replacement for standard Windows calculator.
PG Calculator works in algebraic and RPN mode. It recognizes real and complex numbers and allows simple vectors manipulations.
There are up to 120 recognized units of measure with possibility to make easy conversions between consistent units.
Enhancements:
- fixed to compile with GCC 4.1.1

Bobs Calculator is a simple command-line calculator. Does standard math in base 2/8/10/16, binary and/or/xor/not, and binary shift left / right.

Uses readline for command history and prints out calculation results in base 2/8/10/16. Great for random calculations during coding, or whatever. New version 1.1 inspired by ? key in IDA. Not a bc(1) clone.

Installation:

1. make
2. ./bc
3. help
4. C-d
5. vi calc.y
6. read top comment
7. :q
8. cp bc /somewhere/in/path
9. rehash (on *csh)

Sin/Cos calculator is a mathematical comand-line calculator.

I was chatting to this guy on IRC who was moaning about his homework. trying to write a program to do this in bash. I said youd be much better off doing it in C, and wrote this. Gave it to him the next day after theyd finished the chapter.

As it does both, theres two executables, it builds main() depending on preprocessor definition... more in the source file.

Compile with:

gcc -lm sin_rule.c -ansi -pedantic -DSINE_RULE -o sin-rule
./sin-rule

galculator is a GTK 2 based calculator with ordinary notation/reverse polish notation, a formula entry mode, different number bases (OCT, HEX, DEC, BIN) and different units of angular measure (DEG, RAD, GRAD).
[a basic calculator] galculator features two user modes: basic and scientific mode. Basic mode is intended for simple computations. Only the most important operations and functions are available in algebraic mode as well as in Reverse Polish Mode. Formula entry, available for the basic as well as for the more sophisticated scientific mode, aims to make the calculator even more user friendlier: type as you would write on a paper!
[a scientific calculator] Scientific Mode is galculators state-of-the-art. It supports different number bases (DEC/HEX/OCT/BIN) and angle units (DEG/RAD/GRAD) and features a wide range of mathematical (basic arithmetic operations, trigonometric functions, etc), other useful functions (memory, etc) and user defined functions. Of course, algebraic mode as well as Reverse Polish Notation are available. See below for a detailed list of supported functions.
[a GTK 2 based calculator] galculator is written entirely in C and uses GTK version 2. Especially the display takes big advantages of the new possibilities in GTK 2. Have a look at the screenshots section to see what Im talking about.
[why another calculator] Some time ago, I was looking for a GTK based calulator. Nothing special, just for simple computations. But I wasnt able to find one. This application lacked full keypad support, that one didnt know hexadecimal numbers. Therefore I decided to write my own calculator application with all the features Id expected others to have.
Main features:
- Algebraic mode, RPN (Reverse Polish Notation) and Formula Entry mode
- decimal, hexadecimal, octal and binary number base
- radiant, degree and grad support
- arithmetic precedence
- Basic and Scientific Mode
- user defined constants
- user defined functions
- trigonometric functions
- power, sqare root
- natural and common logarithm
- inverse and hyperbolic functions
- memory functions
- logical operations
- display RPN stack
- preferences dialog/configuration file
- display modules
- X pasting
- i18n
- configurable variable type in HEX/BIN/OCT mode
- thousands separator

GTK-Bitrate calculator package provides a GUI and a command line tool for DIVX encoding bitrate calculations.

Its quite good commented so its a good example for a project.

Debt Payoff Calculator is a simple set of PHP (5) scripts that will allow users of a web site to enter their monthly income, monthly budget, and outstanding debts.
The system can then generate a debt payoff report predicting how long it will take to pay off the debts.
The algorithm is:
1. Get total monthly income.
2. Get total monthly expenses.
3. Amount available for debt service is income - expenses;
4. Compute the "kicker" as %20 of Available, reduce available by this amount.
5. Compute the ratio of each debt to total debts.
6. Multiply Available by each ratio to get the potential payment.
7. For the smallest debt, add the kicker.
8. Test if any debts would be paid off
8a. If a debt could be paid off, make the payment, adjust the last debt pointer.
8b. Add any excess funds to the other potentials, using ratio2 which excludes the debt to be paid off.
8b. Repeat 8.
9. Make the remaining payments for debts not paid off.
Repeat 5-9 until all debts paid off.
Print the table of payments.
Enhancements:
- This release has been tested with Internet Explorer and Mozilla as clients.