Just Calculator

A simple, elegant calculator. A calculator that does not collect your personal data, analytics, or any data whatsoever. It's just a calculator. Simply yours entirely.

- Time-tested calculations using the math.js library. For more details, visit https://github.com/josdejong/mathjs
- Responsive design — adapts seamlessly to any screen size, from small phones to large desktop windows
- Portrait & landscape modes — landscape reveals an extended scientific calculator panel with trigonometric, logarithmic, and power functions
- Live preview — shows the intermediate result in real time as you type, just like Google Calculator
- Input validation — prevents invalid input sequences (double operators, repeated functions, etc.)
- Auto-copy — result is automatically copied to clipboard when you press =
- Scientific functions — sin, cos, tan, sinh, cosh, tanh, ln, log10, sqrt, cbrt, abs, factorial, powers, and more
- Dark & Light themes — toggle between dark and light modes