Scientific Calculator

How to use

1. 1Type an expression in the input box. Press Enter or tap = to evaluate. Live result appears as you type.
2. 2Switch between Radians, Degrees, and Gradians for trig. The chosen mode applies to sin, cos, tan, and their inverses.
3. 3Use the on-screen keypad for digits, operators, and constants. Tap a function like sin or log to insert it with the caret already inside the parentheses.
4. 4Use Ans to reuse the previous result. Use M+, M-, MR, and MC to save, recall, and clear a running memory value.
5. 5Pick Auto, fixed decimal, or Scientific notation for the result format. Click Copy to copy the expression and result together.
6. 6Tap any line in History to bring that expression back into the editor for a quick edit.

About this tool

Scientific Calculator evaluates full math expressions in the browser. It supports the standard scientific function set: sin, cos, tan, their inverses asin, acos, atan, the hyperbolic forms sinh, cosh, tanh, common logarithm log (base 10), natural logarithm ln, log base 2, exp, sqrt, cbrt, abs, ceil, floor, round, factorial (!), nCr, nPr, mod, and the two-argument min and max. Constants pi, e, tau, and phi are built in, and a previous-answer variable called ans plus a four-slot memory (M+, M-, MR, MC) let you chain calculations the way a Casio fx-991 or TI-30 would. Trig respects an angle mode toggle: radians by default, degrees, or gradians. Results display in five formats: auto, two/four/six decimal places, or scientific notation, and copy with a single click. A history panel keeps the last sixteen evaluations and brings any of them back to the expression box on tap. Expressions are parsed with a recursive-descent grammar that handles operator precedence, right-associative exponent, parenthesized groups, unary minus, implicit multiplication (2pi, 3(x+1)), and the postfix factorial. Everything runs locally with the browser's native Math.* functions. No expression, result, or history is ever uploaded.

Free to use. Works in your browser. No signup, no login.