Scientific Calculator

Sometimes a basic calculator isn't enough — you need trigonometry, logarithms, exponents or roots for schoolwork, engineering, science or finance. This scientific calculator runs in your browser with no app to install, covering the full set of functions: sine, cosine and tangent (and their inverses), natural and base-10 logarithms, powers and square roots, and the constants π and e.

It works two ways: click the buttons like a physical calculator, or just type on your keyboard — digits, operators, parentheses, Enter to evaluate, Backspace to correct. A degree/radian toggle controls the trig functions, so sin(30°) gives 0.5 in degree mode, the setting most everyday problems need. Expressions respect proper order of operations, including correct handling of parentheses and right-associative exponents (2^3^2 is 512, as it should be), so complex calculations evaluate correctly rather than left-to-right.

Under the hood, the calculator uses a purpose-built math parser — not the browser's eval — which means it's both safe and precise, showing an honest "Error" for malformed input rather than a confusing result. Whether you're checking homework, working through an engineering formula or just need √ and x^y in a hurry, it's a proper calculator that's always a browser tab away, free and private.