Scientific Calculator

Free online scientific calculator with trigonometry, logarithms, exponents, roots, factorials, and more. Works in your browser, no download needed.

Runs entirely in your browser — files never uploaded

Keyboard supported: numbers, operators, Enter, Backspace, Escape

How to use Scientific Calculator

1. Enter an expression. Click the buttons or type on your keyboard to build a mathematical expression.
2. Use scientific functions. Access trig, logarithmic, power, and factorial functions from the extended button grid.
3. Toggle DEG/RAD. Switch between degree and radian mode for trigonometric calculations.
4. Get the result. Press = or Enter to evaluate. The result appears on the display.

Does this calculator support keyboard input?

Yes. You can type numbers, operators, and parentheses directly. Press Enter to evaluate and Escape or Delete to clear.

What is the difference between DEG and RAD?

DEG interprets angles in degrees (360 per full circle). RAD uses radians (2pi per full circle). Toggle the mode button to switch.

How does memory work?

M+ adds the current result to memory, M- subtracts it, MR recalls the stored value, and MC clears memory.

Is eval() used internally?

No. Expressions are parsed and evaluated with a safe recursive-descent parser. No eval() or Function constructor is used.