A calculator is a device for performing numerical calculations. The type is considered distinct from both a calculating machine and a computer in that the calculator is a special-purpose device that may not qualify as a Turing machine. Although modern calculators often incorporate a general purpose computer, the device as a whole is designed for ease of use to perform specific operations, rather than for flexibility. Also, modern calculators are far more portable than most other devices called computers, though many PDAs are comparable in size to handheld calculators.
Calculators :: Software
Calculators :: Hardware
Calculators :: Mathematics
Software :: Education
Online Calculators :: Units of Measurement

16 function webpage calculator - Scientific web page calculator, written in JavaScript.
1st Calculator - Scientific calculator.
Meta Description: [ 1st Calculator - handy and useful expression calculator and converter with skins and lots of features ]
5000 digit calculator - A calculator that takes calculations out to many, many digits
Meta Description: [ High accuracy Windows calculator ]
A3Calc - Calculator program for the Nokia 9210/9210i/9290 Communicator: also PC/Windows. EPOC version for sale by post, Windows version is postcardware.
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AddsUp - PC function calculator that operates in Windows.
Meta Description: [ The ease of an adding machine with the power of a computer. ]
Advanced Converter - Program for conversion between units of measurements.
Meta Description: [ Masterra specializes in developing windows desktop applications for using at home and office: ByteSweeper, Email Reserve, Advanced Converter, PostSmile ]
Archimede - A powerful calculator for Linux. Algebric, RPN, vectors, matrices, quaternions, System, equations, complex numbers, solution of triangles, measure conversion. License GPL.
Meta Description: [ enhanced RPN and algebraic calculator with a measure converter free for 30 days ]
BAC Computer Software - Calculator that performs the basic arithmetic operations on fractions and then at the press of a button gives you a detailed explanation of how the computation was done.
Meta Description: [ A calculator that performs the basic arithmetic operations on fractions AND then at the press of a button gives you a detailed explanation of how the computation was done. An ideal tool for learning about fractions and how to do the basic arithmetic operations on them. Also includes a factoriser,... ]
Big Integer Numbers Calculator - Free download big integer numbers calculator.
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Calcs4 - A library of online calculations for use with your web browser as well as the ability to create your own calculations and publish them to the web for your own use or to share with the webpage community.
Meta Description: [ Calcs4 view, run, create, store, share, publish online Internet calculations. Extensive free library of online calculations for your personal use. You can also create your own calculations using the Calcs4 web application and publish them to the web. ]
Calculator Directory - Extensive variety of software calculators collected in one directory. Scientific, graphing, loan and mortgage, currency and conversion calculators.
Meta Description: [ Calculators for PC. ]
Calculator Express Math Formulas - Includes arithmetic, mortgage and currency exchange processing features. Uses a dialog box and icons for input.
Meta Description: [ CalcExpress(tm) takes math formulas to generate calculators with these features: a history to repeat recent calculations; a calculations protocol which can be exported as an rtf file to be included in winword documents, or an xml file, to be published in the www; quickstart from the tray. to... ]
Calculator.org - Calculator resources including free download of scientific engineering, statistical, and financial calculators.
Meta Description: [ Calculator resources, free calculator software downloads, online calculators, units conversions, physical properties and constants, books about calculators, recommended hardware, and help. ]
Calculators by Ken - Reference programs written in VB3. Includes common mathematical formulas.
Meta Description: [ Quick and easy conversion calculators
for your computer. New concept and very easy to use. All conversions at once! ]
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CLK-Calculator - RPN Calculator with unit conversion and matirx calculator. Functions for vectors and complex numbers and a function-plotter.
Meta Description: [ CLK-Calculator- Ein RPN Taschenrechner mit Einheitenumrechnung, Funktionsplotter, Matrix-Rechner, CLK-Calculator- A RPN Calculator with Unit Converter, Function Plotter, Matrix Calculator ]
Command-line Calculator for tcsh/bash/zsh - Guide on how to create a simple command-line calculator for the tcsh, bash and zsh shells.
Meta Description: [ Simple command-line calculator for tcsh, bash and zsh ]
Constructive Reals Calculator - An RPN calculator applet and supporting Java library.
Date Calculator - Perform date math, calculate date differences, and organize data and events.
DateCalculator - DateCalculator v3.1.0 by Joesoft
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DreamCalc Pro - Photo-realistic scientific and financial calculator for Windows. Free trial download.
Meta Description: [ DreamCalc. Scientific, Graphing and Financial Calculators for Windows. ]
Easy Date Converter - Adds a number of days to a date, calculates the number of days between two dates, and converts among Gregorian dates, Julian dates, Julian day numbers and ordinal dates of the form yyyyddd. Supports batch computation.
Meta Description: [ Does date arithmetic (adds a number of days to a date and calculates the number of days between two dates) and converts among dates in six different solar calendars. ]
EngCalc Calculator - Calculate and evaluate expressions even by copying and pasting expressions from other applications. It can also read txt (Text) or .doc files automatically line by line.
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ESBCalc Pro Home Page - Scientific calculator with many features including Paper Trail. Windows32. Free trial download.
Meta Description: [ Enhanced Scientific Calculator for Windows with Paper Trial, many functions and highly configurable. Ideal for Desktop Calculations ]
Fung-Calc - Graphing Calculator - 2D and 3D graphing calculator for Linux with multiple graphing modes.
Meta Description: [ Fung-Calc - The free, opensource Linux advanced, yet easy to use, graphing calculator ]
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Fuzzycrawler Scientific Calculator - Javascript-based online calculator.
GCalc - An online graphing calculator Java applet.
GCalc -- Java Mathematical Graphing System - Free online graphing calculator for education use with 2d, 3d, cartesian, polar, calculus, differential equations, scientific, implicit function components.
Meta Description: [ Home of the free online graphing calculator, GCalc. Provides one of the best mathematical graphing utility available on the Internet. ]
gNumerator - A interactive computer math system that uses standard JavaScript as the scripting language, and a collection of re-usable math oriented components such as a complete MathML DOM implementation, and a MathML viewing / editing control.
GoldfishSoft - Free software for the Macintosh. FrakKalk, the newest GoldfishSoft Program, is a fraction calculator for Mac OS X.
Harculator - Fully functional graphing calculator built around the Microsoft Office suite.
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Haxial Calculator - High precision calculator with unit and radix converters.
HiDigit - Powerful calculator for students and teachers. Five number systems, full complex numbers support, and 15-digit maximum precision.
Meta Description: [ Scientific calculator for Windows. Use HiDigit calculator to evaluate complicated scientific formulas. Download calculator from Binary Things ]
High Precision JavaScript Calculator - A JavaScript Calculator that adds, subtracts and multiplies fairly large numbers. Functions are added in my copious free time.
iFigure - Guide to online calculators, including those designed for home, travel, finance, health, and small business.
Meta Description: [ online calculators for house and home, car and travel, money and personal finance, health and medical, business and management, science and engineering, and mathematics and statistics. ]
Jason's Calculator - Open source calculator application for the Windows platform.
Meta Description: [ The world's largest development and download repository of Open Source code and applications ]
Jason's Calculator - The homepage for an easy to use multipurpose shareware calculator.
Meta Description: [ An extremely useful multipurpose shareware calculator made by Jason Keller. ]
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Kalculator for KDE 1.0 - Evaluates mathematical expressions. Includes history feature, function-pick window, and help. Variables and hex numbers are also supported.
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Lygea Pocket 15C Scientific Calculator for Pocket PC - HP-15C scientific emulator for Pocket PC.
Meta Description: [ Lygea Pocket 15C ($16.95) emulates the HP-15C scientific calculator on your Pocket PC. Supports hundreds of built-in functions that include basic and advanced math. ]
Math Expression Calculator - Evaluates mathematical expressions involving multiple variables. Offers product description, screen shots and user guide.
Meta Description: [ math software tools for everyday home and business needs ]
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MathServ Calculus ToolKit - Online calculators for several calculus functions.
Matrix Calculator - Calculator for basic matrix operations. A demo version download is available.
Meta Description: [ MATRIX is a matrix calculator program written to help linear algebra students. All calculations are
done with fractions. FREE Windows Demo. ]
Matrix Calculator - Online Java calculator for matrix operations.
Meta Description: [ Calcul en ligne : multiplication de matrices, inversion de matrice, déterminant de matrice, équation linéaires n équations n inconnues ]
Maximath - Graphing calculator. Includes matrix editor and unit conversions.
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Monachos Calculators - Online calculators with variety of engineering functions, including unit conversion, periodic table, piping applications, and electrical applications.
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Multi-Function Calculator - Multi-function shareware calculator, and unit conversion utility for Windows. Four modes of operation: statistics, trigonomety, base-n, and unit conversion.
Meta Description: [ FNA - Multi-function calculator and conversion utility for Windows from RJ Software ]
My Ten Key - A realistic ten key calculator designed by a CPA.
Meta Description: [ An authentic ten key calculator (tenkey or adding machine)
for the office professional designed by a CPA ]
Online Calculators - A collection of everyday use calculators and converters written in Javascript and PHP, available to use and download.
Meta Description: [ Online Calculators ]
Online Matrix Calculator - Calculates matrix determinant and inverse. Performs LU, Cholesky, QR, SVD decompositions. Calculates eigenvalues and eigenvectors.
Meta Description: [ Matrix Calculator. Calculates determinant, trace, rank, inverse, pseudoinverse, eigenvalues and eigenvectors. Performs LU, Cholesky, QR, Singular value decomposition. ]
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PALM OS Calculator - The calculator is being provided in several versions, depending on the tasks to solve.
PAPCW - Programmable arbitrary precision RPN calculator. Zip file, download will start immediately.
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PG Calculator - A scientific calculator with full customizable user interface. Aalgebraic and RPN mode. Windows; shareware trial version.
Meta Description: [ Windows and Linux PG calculator software online for math to algebra, geometry. Full scientific skinable. 80 built-in functions described below ]
PHP Calculators - A collection of advanced statistical analysis calculators including averaging, histograms and sampling.
Pocket 16C Calculator - HP-16C emulator calculator for Pocket PC, by Pirrama Development. Free trial download.
Meta Description: [ HP-16C calculator emulator for Pocket PC by Pirrama Development. Just like the real thing, only faster! ]
Pocket Calculator - Online calculator, written in Java. Includes Square root button and number memory. Source code can be downloaded.
PractiCalc Windows Calculator - PractiCalc is a calculator and conversion tool for all 32 bit windows platforms. It provides result of calculations they are typed.
Programmable Mathematics Freeware - Calculator and numeric system supporting permanent installation of user defined functions and libraries.
Meta Description: [ A free graphing calculator for mathematicians, scientists, engineers that lets users install their own functions and libraries ]
Quadratic Equation Calculator - Calculator for solving a general quadratic equation.
Meta Description: [ quadratic equation calculator, quadratic calculator, algebra, algebraic equation calculator ]
RPN Calculator - This Windows programs emulates a fully programmable HP29C RPN calculator that has been augmented with linear curve fit and graphing capability. It was written to serve as a fun introduction to computer programming.
Meta Description: [ Learn computer programming from a 3 part curriculum consisting of a programmable RPN calculator, an Intel 8051 microprocessor, and the C++ language. ]
sCal and sCal2 - Small, open source (free), scientific and engineering, JavaScript-programmable calculators.
Meta Description: [ sCal is a small, scientific and engineering, programmable calculator,
providing dozens of customizable unit conversions and procedures. sCal2 is an
expansion for data handling--multiplying capabilities to hundreds of factors/procedures
with a more systematic input-prompt/output-label schem... ]
Scientific Advantage Calculator for Pocket PC - Scientific Advantageâ„¢ is a Unit Awareâ„¢ calculator that lets you work with feet-inch-fraction dimensional values and includes advanced math functions, automatic solvers, and much more. Unit Awareâ„¢ means that you can effortlessly compute with units (not just convert).
Meta Description: [ Advantage Calculators provides the most powerful and easiest to use calculator software for your PC and Pocket PC. ]
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Scientific and Currency Calculator - Fully functional expression calculator. Linux/Windows versions. Free trial download.
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Scientific Calculator - Javascript scientific calculator using RPN.
Meta Description: [ stack scientific calculator RPN , Reverse Polish Notation, using javascript ]
Scientific Calculator - Java applet online calculator.
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Scientific Calculator - Includes arithmetic, square root, exponent, natural log, trigonometry functions. Also, has parenthesis and memory features.
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Scientific Calculator - Javascript calculator with basic scientific functions.
Scientific calculator with graphing capabilities - Fornux Calculator is a scientific calculator for Windows that can plot functions and diagrams with many mathematical functions for statistics and algebra.
Meta Description: [ Fornux PowerCalc-GX is a powerful scientific graphing calculator for Windows that can graph 2D, 3D functions, bar charts and scatter plots, supports rpn notations and offers many mathematical functions for statistics, vector and linear algebra. ]
ScriptConsole - Mathematical calculations using scripts and commands in a console-based multiple-window interface using the Microsoft VBScript engine. Windows; shareware.
Meta Description: [ Math ScriptConsole: console-based interactive calculation and automation software for scientists and engineers. Windows calculator replacement. Lighter than matlab. It integrates all DOS commands in Windows GUI. ]
Showcalc - Calculator with scrolling tape display.
Sicyon - Online graphing calculator.
Meta Description: [ Sicyon is a freeware sci/eng all-in-one software tool - expression calculator, database, units convertor, solver ]
Speakeasy - A user-oriented software package that allows non-programmers the opportunity to explore the computational power of their computer. Free trial download.
Meta Description: [ Speakeasy Software - The Original High Performance Computational Software Satisfying The Technical Computing Needs of Scientists, Engineers, Researchers, Students and Educators ]
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SplineCalc - SplineCalc is a multipurpose scientific calculator for implementation of various mathematical operations with maps (grids), data tables, lines, polygons and numbers.
Meta Description: [ SplineCalc is ... ]
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Syberad - A full-function scientific calculator for Windows. Trial download.
Syntan - a calculator of math functions for Windows. - A calculator of math functions based on syntax analysis with living graph. Free download.
Meta Description: [ Syntan is a sophisticated calculator of math functions for Windows (free download). ]
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The JavaScript Source - A collection of JavaScript calculators to either download for incorporation to a website, or perform calculations on.
Unit Conversion Tool - Convert between 2200 units in 78 measurement categories. Includes units for length, mass, temperature, volume, area, speed, pressure, energy, power, force, fuel consumption, flow and torque.
UnitMath - Simplifies calculations involving numbers, units, and precision.
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URL-Calculator - Web application that evaluates arithmetic expressions embedded in a URL.
Meta Description: [ A calculator in the url. In the subdomain. Change the domain, and the result will be changed. Totally unique. Awardes as useless site of the week (July 1st, 1998) ]
Volume of Partially Full Cylinders, Spheres and Cones - Java applet for partially full cylinder (on side), sphere, and cone.
Meta Description: [ Compute volume of cylindrical, spherical, and conical shapes. Storage tank quantities. Equations, software on-line ]
Wahoo Software - Financial desktop calculator.
WebCalc - Collection of free web based calculators for many subject areas.
Meta Description: [ WebCalc.net is the best place to find all of your calculating needs in one place ]
WIRIS - JAVA applet that allows mathematical online calculations.
Meta Description: [ WIRIS, càlcul matemàtic on-line de lliure accés ]
Wise Calculator Homepage - Scientific and engineering calculator for Windows.
X-Bc - a GUI to bc - X-Bc is desktop calculator that provides lots of functionality for scientific working. Input and output stay visble at all time for correction and comparation. It's a frontend to bc.
Meta Description: [ X-Bc is a graphical user interface to the arbitrary precision calculator bc. It is written for Linux (Unix). It provides lots of funcionality, such as trogonometry, number theory and the usual calculator functions, but is held simple and not disturbing. ]
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