Scientific Calculator Online
A powerful, free, and easy-to-use tool for all your scientific and mathematical calculation needs. It handles everything from basic arithmetic to complex functions like trigonometry, logarithms, and exponents.
Calculator UI
How to Use This Calculator
- Basic Operations: Use the number pad and standard operators (+, −, ×, ÷). The `=` button evaluates the expression.
- Advanced Functions: Click functions like `sin`, `cos`, `log`, or `√`. These will operate on the number currently displayed in the main input.
- Order of Operations: Use parentheses `(` and `)` to group parts of your expression and ensure the correct order of operations.
- Keyboard Support: You can type most inputs directly from your keyboard, including numbers, operators, and parentheses. Use `Enter` for `=`, `Backspace` for `DEL`, and `Escape` for `C`.
- Clearing: `C` clears all input and history. `DEL` (or Backspace) removes the last digit from the current input.
Frequently Asked Questions
What functions does this calculator support?
It supports basic arithmetic (+, -, *, /), percentages (%), exponents (^), square roots (√), parentheses, trigonometric functions (sin, cos, tan), and logarithms (ln for natural log, log for base-10 log).
Are the trigonometric functions in degrees or radians?
All trigonometric functions (sin, cos, tan) operate in radians, which is the standard for JavaScript's Math library and most programming contexts.
What's the difference between 'ln' and 'log'?
'ln' calculates the natural logarithm (base e), while 'log' calculates the base-10 logarithm.
Can I use my keyboard?
Yes! You can use your keyboard for numbers, basic operators (+, -, *, /), parentheses, exponents (^), 'p' for π, 'e' for e, Enter for '=', Backspace for 'DEL', and Escape for 'C'.