Scientific Calculator
A full-featured scientific calculator — works just like the real thing.
How to Use
Type on your keyboard or tap buttons. Supports sin, cos, tan and their inverses (press 2nd), logarithms (log and ln), square root, powers, pi, and Euler's number. Toggle between degrees and radians with the DEG/RAD button. Use parentheses for complex expressions. Press AC to clear or ⌫ to delete the last character. Your full expression history shows in the display.
FAQ
Is this calculator accurate?
Yes — it uses JavaScript's built-in Math library which provides IEEE 754 double-precision floating-point arithmetic, accurate to about 15-16 significant digits.
Can I use my keyboard?
Yes! Number keys, operators (+, -, *, /), Enter for equals, Escape for clear, Backspace for delete, and parentheses all work.
What's the difference between log and ln?
log is base-10 logarithm. ln is the natural logarithm (base e ≈ 2.71828). For example, log(100) = 2 and ln(e) = 1.