# 8 Best Free Open Source Calculator Software For Windows

Here is a list of **best free open source calculator software** for Windows. What distinguishes these calculators from the calculators listed here is the fact that these are free and open source calculators. You can find the source code of these calculators from their official websites. The source code can be downloaded, studied, and manipulated by the interested users.

You can perform simple as well as complex calculations using these software. These let you solve different kinds of mathematical problems including * Algebra, Calculus, Combinatorics, Complex Numbers, Data Sets, Date & Time, Exponents & Logarithms, Geometry, Logical, Matrices & Vectors, Number Theory, Statistics, Step Functions, Trigonometry, *etc. In addition, you can also perform calculations related to

*graphs, physics, economics, probabilities,*etc. Some of these also provide some constants to add in the input expression. A few of these also provide a formula book containing some generic formulae to use directly in your calculations. You can also record an expression as a macro to quickly use later. Apart from these features, you can

*view calculation history, import expressions from CSV file, save results,*etc.

### My Favorite Open Source Calculator Software For Windows:

**Qalculate** is my favorite open source calculator for Windows. It lets you solve a wide number of problems in different approximation and fractional modes.

You may also like some best free Open Source Billing Software, Open Source Budgeting Software, and Math Equation Editor Software for Windows.

## Qalculate

**Qalculate** is a **free open source calculator software** for Windows. It is quite an advanced calculator with various approximation modes (Always Exact, Interval Arithmetic, Try Exact, Approximate) and fractional modes (Decimal Rationals, Exact Rationals, Fraction, Combined). You can also select *number base, numerical display, unit display, assumptions, algebraic mode, precision, decimal, RPN mode, angle unit,* etc. to perform calculations. Just type an expression and hit enter to get respective results. You can also view calculation history on its main interface which can be copied to the clipboard. The good part is that it lets you import expression from CSV files for calculation purpose and later export results to another CSV file.

It supports different kinds of calculations which include **Algebra** (linear equation, summation, differential equation, etc.), **Calculus** (integrate, differentiate, limit, etc.), **Combinatorics** (combinations, factorial, double factorial, permutations, derangements, etc.), **Complex Numbers**, **Data Sets**, **Date & Time**, and **Exponents & Logarithms**. There are many more calculations which can be performed using this open source calculator. These include **Economics** (microeconomics, compound, dollar decimal, dollar fraction, interest rate, treasury bill price, etc.), **Geometry** (circle, conde, cube, cylinder, sphere, square, etc.), **Logical**, **Matrices & Vectors**, **Number Theory**, **Statistics** (mean, moments, random numbers, distribution, etc.), **Step Functions**, **Trigonometry**, etc. It provides some additional utilities which you can use, such as *Replace, Concatenate String, Interval, Function, RPN Stack Register, RPN Stack Vector, Process Matrix Elements,* etc. A separate **Conversion** tab is provided to carry out various unit conversions. From its Variables menu, you can add various variables including *physical constants, date & time, basic constants, large numbers, small numbers,* etc. Also, you can select and add a unit for a particular calculation such as *angular acceleration, currency, electric charge, electric current, pressure, surface tension,* and many more.

In general, it is one of the best solutions to the students or general users who are looking for a free and open source calculator software.

## SpeedCrunch

**SpeedCrunch** is a nice free open source calculator software for Windows. It lets you perform basic and scientific calculations. It comes with a formula book with various formulae related to different functions including *Algebra, Geometry, Unit Conversions, Electronics,* and *Radio Frequency*. You can directly select a formula, fill in values, and get the respective results. If there is a mistake in the input expression, it will display the error. You can also view constants and respective values, functions, variables, etc. It lets you add user functions as well. Apart from these basic features, you get some other useful options which are:

- It lets you view the history of performed calculations.
- You can export performed calculations as TXT or HTML file.
- It lets you customize
*result format, input format,*and*angle unit*. - You can customize software behavior, display settings, and language too.

## Precise Calculator

**Precise Calculator** is a **free**, **portable**, and **open source calculator** for Windows. Using it, you can perform basic as well as scientific calculations. You can use some generic constant values directly in your calculations from its *Constants* menu. It lets you set arbitrary precision value and select units to perform calculations. Also, you can select number base (binary, decimal, hexadecimal), angle unit, and result format (normal, scientific, engineering, fix).

It lets you create macros for specific functions to use them later. You can also use some inbuilt macros including *prime numbers, cubic equations, quadratic equations, divisors, various plane,* etc. The history of calculations can also be retrieved any time. The results can be saved in a text file. There are various program settings that you can configure including *log file creation, font and color customization, interface language selection,* etc.

## Xcas

**Xcas** is the next open source calculator software for Windows. It can be used to perform a variety of calculations which include **simple arithmetic calculations, trigonometry functions, factorization, calculus** (integration, derivatives, Laplace transform, etc.), **linear algebra** (create matrix, transpose, image, kernel, etc.), **equations** (linear equation, differential equation, recurrence equation, etc.), and** probability**. It also lets you quickly perform **graphs** (curve, surface, sequence, trace, animation, etc.), **geometry** (points, lines, triangles, circles, polygons, solids, transformation, etc.), and **physics** (area, volume, length, energy, temperature, pressure, viscosity, etc.) related calculations. It provides some inbuilt commands in different categories to use in calculations, such as *constants, permutations, intervals, complex, linear algebra, polynomials,* etc.

As you perform calculations, you can view the calculation history for current session on its interface. You can print the results or save them in its native file formats for later use.

All in all, it is a good calculator software which comes with open source license. You can configure various properties in this software such as graph configuration, language, font, color, etc.

## GraphCalc

**GraphCalc** is one more open source calculator in this list. It lets you perform various calculations which include *basic arithmetic operations, trigonometry problems, 2D graphing, conversion,* etc. It provides a dedicated **Equation Solver** tool to solve a single variable algebraic equations. In addition, some generic calculations like *area, surface area, volume, quadratic equations,* etc. can directly be performed. For 2D graphing, you get analysis options like *Find Area, Trace, Tangent Line, Distance Between Two Points, N-Slider,* etc. You can copy, print, or export the graph to BMP image.

From its *Options > Mode* option, you can select *Decimal Places, Output Format, Unit, Base*, etc. You can save specific commands to a script file so that you can use it later. It lets you save output to an RTF file. The calculation history can be easily viewed from the interface.

## Kalq

**Kalq** is a simple open source calculator for Windows. It has a compact interface as you can see in above screenshot and it works in distraction free mode. After launching it, type or copy and paste expression you want to solve in the bar. As you type the expression, it displays respective results in real time. You can solve simple mathematical problems in it like *fractions, multiply, square root, square, cube, inversion,* etc.

On clicking the option highlighted in above screenshot, you can access various options like *History, Bar Size, Formatting, Copy Answer,* etc

## TTCalc

**TTCalc** is another free open source calculator for Windows. It incorporates *arithmetical functions, trigonometric functions, inverse trigonometric functions, hyperbolic functions, inverse hyperbolic functions, logical operators, logarithms,* etc. for calculations. It lets you add custom variables and functions to use in calculations. The precision value can be set to small, medium, or high. From Display tab, you can set parameters like *input base, output base, input decimal point, output decimal point, rounding,* etc.

## JCalc

**JCalc** is another one of open source calculators for Windows. It is a portable calculator which needs to no installation and can be used on the go.

It is quite a simple calculator which lets you perform simple, binary, octal, and hexadecimal calculations, and solve simple equations. A keypad to enter an expression is provided in it. The history of added expressions is visible on the interface. You can also save the expression with the respective result in a separate file.

## About Us

We are the team behind some of the most popular tech blogs, like: I LoveFree Software and Windows 8 Freeware.

More About Us##### Archives

- February 2021
- January 2021
- December 2020
- November 2020
- October 2020
- September 2020
- August 2020
- July 2020
- June 2020
- May 2020
- April 2020
- March 2020
- February 2020
- January 2020
- December 2019
- November 2019
- October 2019
- September 2019
- August 2019
- July 2019
- June 2019
- May 2019
- April 2019
- March 2019
- February 2019
- January 2019
- December 2018
- November 2018
- October 2018
- September 2018
- August 2018
- July 2018
- June 2018
- May 2018
- April 2018
- March 2018
- February 2018
- January 2018
- December 2017
- November 2017
- October 2017
- September 2017
- August 2017
- July 2017
- June 2017
- May 2017
- April 2017
- March 2017
- February 2017
- January 2017
- December 2016
- November 2016
- October 2016
- September 2016
- August 2016
- July 2016
- June 2016
- May 2016
- April 2016
- March 2016
- February 2016
- January 2016
- December 2015
- November 2015
- October 2015
- September 2015
- August 2015
- July 2015
- June 2015
- May 2015
- April 2015
- March 2015
- February 2015
- January 2015
- December 2014
- November 2014
- October 2014
- September 2014
- August 2014
- July 2014
- June 2014
- May 2014
- April 2014
- March 2014