A fully featured scientific calculator that runs entirely in your browser. Supports arithmetic, trigonometric functions, logarithms, powers, factorials, and complex expressions with parentheses — no installation needed.
Type or click an expression using the button grid — digits, operators (+, −, ×, ÷, ^, %), parentheses, and functions like sin, cos, ln, sqrt.
Select DEG or RAD at the top to choose how angles are interpreted for trigonometric functions.
Press = (or Enter on your keyboard) to evaluate. The previous expression appears above the display for reference.
What is Scientific Calculator?
This scientific calculator evaluates mathematical expressions using a safe shunting-yard algorithm, meaning your input is never passed to JavaScript's eval. You can chain operations, nest parentheses, and mix functions freely — for example sin(30) + sqrt(16) / 2.
Toggle between degrees and radians to control how trigonometric functions (sin, cos, tan) interpret their arguments. All other functions — ln, log₁₀, square root, factorial, and inverse — work the same in both modes. Results are displayed with up to 12 significant figures, and very large or very small values switch automatically to scientific notation.
Full keyboard support is built in: type digits, operators, and parentheses directly without touching the mouse. Press Enter or = to evaluate, Backspace to delete, and Escape to clear.
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FAQ
Is it safe to evaluate complex expressions?
Yes. The calculator uses a custom shunting-yard parser instead of JavaScript's eval, so only valid mathematical operations are executed and there is no risk of code injection.
How do I calculate factorial?
Click the n! button, enter the number inside the parentheses, and press =. For example n!(5) returns 120. Factorials are only supported for non-negative integers up to 170.
What does the xʸ button do?
The xʸ button inserts the power operator ^ so you can raise any number or expression to a custom exponent. For example 2^10 evaluates to 1024.
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