Calculator
Standard calculator with keyboard support and calculation history.
Overview
Crunch numbers with this scientific calculator that goes beyond basic arithmetic. Features a calculation history log, full keyboard support, and a theme switcher — offering trigonometric functions, parentheses, and operator precedence for accurate mathematical computations.
Key Features
- Scientific Functions — Supports sin, cos, tan, log, square root, exponents, and parentheses for complex expressions.
- Calculation History — Review your past calculations in a scrollable history panel for reference.
- Keyboard Support — Use your physical keyboard for fast input — numbers, operators, Enter, and Backspace all work.
- Theme Switcher — Toggle between light and dark themes for comfortable use in any lighting condition.
Tech Stack
Built with HTML, CSS, and JavaScript. Expression evaluation uses a safe parser (no eval()). Keyboard events mapped via keydown listeners. History stored in session memory.
Problem it solves
The default OS calculator is basic and lacks history. This scientific calculator provides advanced functions with a complete calculation log.
How it was built
Built with HTML, CSS, and JavaScript. Safe expression parser (no eval), keydown listeners for keyboard input, session-based history.
Frequently Asked Questions
Is the Calculator completely free to use?
Yes, the Calculator is 100% free with no account required, no subscription, and no watermarks.
Does Calculator store any of my data or inputs?
No. All generation and calculations run client-side directly in your browser. None of your data or inputs are sent to or stored on external servers.
Can I use outputs from Calculator for commercial projects?
Yes, all results generated with this tool are free to use for both personal and commercial projects without attribution.