Scientific Calculator

Scientific Calculator evaluates a typed expression — trigonometry, logarithms, roots, powers, factorials and brackets — and reports the answer to the number of decimal places you ask for, up to fifteen.

Expressions go through a parser written for this page, not the browser's eval, and it accepts only digits, the operators + − * / % ^ !, brackets, pi, e, and a fixed list of functions: sin, cos, tan and their inverses, the hyperbolics, ln, log, log2, sqrt, cbrt, abs, exp, floor, ceil, round, sign and fact. Anything outside that list is rejected by name and position rather than quietly misread, so a typo tells you which character it stopped at. Powers are right-associative, which makes 2^3^2 equal to 2^9; angles follow the degrees-or-radians switch; and factorial refuses anything above 170, where the result passes what a double-precision number can hold.

The expression is parsed inside the page. Nothing you type is executed as code and nothing is sent to a server.

Working through a physics or engineering problem without a handheld calculator, checking a trigonometric value in degrees, evaluating a long bracketed expression in one line, and pinning a result to a fixed number of decimals.

Also known as: trigonometry calculator · log calculator · advanced math calculator · calculate scientific · scientific calculation · work out scientific