Free Online Calculator
Free online calculator for basic math operations. Add, subtract, multiply, divide with step-by-step solutions. Perfect for students, professionals, and everyday calculations.
Calculator
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Supports: +, -, *, /, ^, %, parentheses
Results
Result
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Calculation Details
Step-by-Step Solution
User Guide
How to Use
- Choose your input mode: Calculator Keypad, Expression Input, or Operation Selection
- Enter your numbers and select operation (or type expression)
- Click 'Calculate' to see results
- View step-by-step solutions and charts
- Use calculation history to track your calculations
Features
- Basic operations: Addition, Subtraction, Multiplication, Division
- Advanced operations: Power, Modulo, Square Root, Trigonometric functions
- Expression evaluation: Type complex expressions with parentheses
- Interactive charts showing calculation history
- Step-by-step solutions for all calculations
- Calculation history tracking
- Export results as JSON
Supported Operations
Basic Operations
- + 添加
- - Subtraction
- × Multiplication
- ÷ Division
- ^ Power
- % Modulo
Advanced Functions
- √ Square Root
- x² Square
- x³ Cube
- 1/x Inverse
- sin, cos, tan Trigonometric
- log, ln Logarithms
Important Notes
- Division by zero is not allowed
- Square root requires non-negative numbers
- Logarithm requires positive numbers
- Trigonometric functions use degrees
- Expression evaluation supports parentheses for grouping
- Use % for percentage (e.g., 50% = 0.5)