Quick Calculator
Fast mathematical expression calculator with support for symbolic variables, smart symbol conversion, and history.
• Define variables like 'x=5' or 'y=x*2'. They support symbolic references and update automatically.
• Supports hex (0x...), binary (0b...), and octal (0o...) input. The output will match the dominant input base.
• Type 'clear' and press Enter to clear history and variables
• Use ↑↓ arrow keys to browse calculation history
• Supports scientific notation: 1e5 = 100000
• Supports all JavaScript Math functions and constants
Templates
Supported Operations
Basic Operators
- • + - × ÷
- • ( ) [ ] { } for grouping
- • % converts to /100
- • ^ power operator
- • MOD modulo (remainder)
Math Functions
- • Math.sqrt(x), Math.pow(x,y)
- • Math.sin(x), Math.cos(x), Math.tan(x)
- • Math.log(x), Math.log10(x)
- • Math.abs(x), Math.round(x)
- • Math.PI, Math.E
Quick Calculator (Online Math Expression Evaluator) - A fast, professional calculator for evaluating mathematical expressions, variables, and functions in real time. This online math calculator supports symbolic variables, dependency tracking, scientific notation, Math functions, and smart symbol conversion, making it ideal for students, engineers, developers, and analysts who need accurate results without a full CAS.
Introduction
Quick Calculator is designed for speed and clarity. Instead of a button-heavy interface, you can type expressions directly, assign variables, and reuse them in later calculations. It behaves like a lightweight math interpreter, making it perfect for quick checks, formula testing, and technical notes.
Current Features
- Expression evaluation with standard arithmetic and parentheses
- Symbolic variables with assignment and reuse across inputs
- Dependency tracking so changes update linked variables
- Scientific notation support for large or precise numbers
- Math functions for common calculations (e.g., trigonometry, powers, logs)
- Smart symbol conversion to handle input variations naturally
- History-friendly workflow for iterative calculation tasks
How to Use
- Enter an expression like
2+3*4or(1+2)^3. - Assign variables using
x=5ory=x*2. - Reuse variables in new expressions to build more complex formulas.
- Review results instantly and adjust inputs as needed.
Usage Notes and Best Practices
- Use clear variable names to improve readability and reduce mistakes.
- Keep related calculations together to benefit from dependency tracking.
- For scientific work, rely on scientific notation for accuracy and scale.
- Check operator precedence or use parentheses for explicit control.
Common Use Cases
- Solving homework or quick engineering checks
- Testing formulas for spreadsheets or code
- Running quick financial or statistical computations
- Verifying unit conversions and numeric inputs
- Prototyping math logic for scripts or algorithms
Use Quick Calculator to compute faster, reduce errors, and keep your math workflow lightweight and efficient.