Calculator is a cross-platform, arbitrary-precision, customizable, multifunction, scientific calculator. Using Calculator, you can perform any of the customary handheld or online calculator operations, and many more. While it serves as an excellent replacement for your operating system's built-in calculator, it also offers many powerful features that are not available together in any other handheld or computer-based calculator. Calculator supports over 25,000 units for conversion in an ever growing list of categories and units. Scientists, engineers, programmers, and students will find it a simple to use, yet powerful, tool.