Uno Calculator is a cross-platform implementation of Microsoft’s Windows Calculator developed using Uno Platform. It brings the familiar calculation interface to several operating systems, including Linux, and provides a browser-based version.
The application includes several calculator modes designed for different tasks. Standard mode handles everyday arithmetic, while scientific mode offers a wider range of mathematical functions and evaluates expressions according to the usual order of operations.
Programmer mode provides number-base conversion and operations useful when working with binary, octal, decimal and hexadecimal values. A separate date calculation mode can determine the interval between dates or calculate a new date after adding or subtracting a specified period.
Uno Calculator also includes conversion tools for measurement units and currencies. Calculation history and memory functions allow users to retain intermediate results and revisit previous operations.
The interface adapts to different window sizes and screen orientations, making it practical for both desktop and touchscreen devices.
This is free and open source software.
Key Features
- Standard calculator mode for everyday arithmetic.
- Scientific mode with mathematical functions and operator precedence.
- Programmer mode with number-base conversion and integer operations.
- Date calculations determine differences between dates.
- Add or subtract years, months and days from a selected date.
- Calculation history allows previous results to be reviewed.
- Memory functions store and recall numerical values.
- Conversions between different units of measurement.
- Currency conversion using externally supplied exchange-rate data.
- Arbitrary-precision arithmetic for supported basic calculations.
- Responsive layout adapts to different screen sizes and orientations.
- Cross-platform support – runs on Linux, macOS, iOS, Android, and in a web browser.
Website: github.com/unoplatform/calculator
Support:
Developer: Uno Platform
License: MIT License

Uno Calculator is written in C# and C++. Learn C# with our recommended free books and free tutorials. Learn C++ with our recommended free books and free tutorials.
This article was written with the help of a site visitor who completed this form. Help the site by suggesting new open source software.
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