Calctus

Calctus is an RPN calculator application for Windows. The calculator features syntax highlighting, autocomplete, and support for multiple number formats. Formats include decimal, hexadecimal, binary, and more. It allows mixing different number systems in calculations. Supports SI prefixes, date and time formats, RGB color representation. Includes built-in constants and functions. Users can define custom constants and functions. Solves numerical equations using Newton's method. Modifying the formula history performs immediate recalculations. External script calls function as functions. The application generates function plots. It has keyboard shortcuts for efficient operation.

★★★★★

5.0(1 ratings)

• Syntax highlighting. Colors different elements of expressions for visual identification. Different colors for numbers, operators, functions, and parentheses. Improves readability of complex expressions. Reduces errors in formula entry.
• Autocomplete. Suggests functions and constants while typing. Speeds up entry of mathematical expressions. Shows lists of available options. Works with built-in and user-defined functions.
• Multi-number system support. Works with decimal, hexadecimal, binary, and octal. Allows mixing different systems in one expression. Automatic conversions between formats. Result representation in the selected format.
• SI prefixes. Interprets International System units. Recognition of nano, micro, milli, kilo, mega, giga. Simplifies work with values of different scales. Automatic conversions between prefixes.
• Date and time functions. Performs calculations with time values. Conversions between date and time formats. Arithmetic operations with timestamps. Calculation of differences between dates.
• RGB color representation. Manipulates color values in RGB format. Conversions between different color representations. Operations with color components. Applications in graphic and web design.
• Built-in constants and functions. Includes common mathematical constants like π and e. Has trigonometric, logarithmic, and statistical functions. Hyperbolic and specialized functions. Updates extend the built-in library.
• Definition of constants and functions. Users create their own custom constants. Definition of functions with custom parameters. Reuse of frequent expressions. Organization of domain-specific calculations.
• Numerical equation solving. Solves equations using Newton's method. Finds roots of non-linear functions. Successive approximations until achieving specified precision. Configuration of convergence parameters.
• Formula history modification. Editing previous calculations in the history. Automatic recalculation after modification. Maintenance of the context from previous calculations. Error correction without re-entering full expressions.
• External script calls. Integration with external programs via scripts. Scripts behave as functions within the calculator. Passing parameters and retrieving results. Automation of complex workflows.
• Graph generation. Visual representation of functions in graphical form. Configuration of ranges and scales. Exporting graphs for documentation. Visual analysis of function behavior.
• Range and selection operators. Working with value intervals. Generation of numerical sequences. Application of operations to entire ranges. Extraction of specific data portions.
• Vectorization of operations. Application of functions to sets of values. Element-wise operations on arrays. Basic matrix calculations. Transformations on multiple data points simultaneously.
• Newton's method solver. Implementation of the Newton-Raphson algorithm. Calculation of numerical derivatives. Control of maximum iterations and tolerance. Handling of non-convergence cases.

Calctus was developed by shapoco. The application is written in an undisclosed programming language. The project is hosted on GitHub under a public repository. Contributions to the source code follow the open source development model. Updates fix bugs and add functionalities. The documentation includes usage examples and a function reference.

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