Scientific Calculator

Scientific Calculator Manual

Use this manual to enter expressions, choose an angle mode, evaluate supported real-number functions, and reuse results with Ans, memory, and page-session history.

Enter and evaluate an expression

Type with your keyboard or use the on-screen keys. The calculator accepts decimal numbers, scientific notation such as 2.5e-4, parentheses, arithmetic operators, powers, postfix factorial, supported function calls, and the constants pi, e, and ans. Press Enter or = to evaluate. Escape clears the current expression.

Operator order

Parentheses and function calls are evaluated first, followed by factorial, exponentiation, unary signs, multiplication/division, and addition/subtraction. Powers associate from the right: 2^3^2 equals 512. A leading minus applies after exponentiation: -2^2 equals -4.

DEG and RAD

Choose DEG for degree angles and RAD for radians. Forward trigonometric functions interpret their input in the selected mode. Inverse functions return an angle in that mode. Hyperbolic functions are not affected by DEG/RAD.

Scientific notation

Use e or E inside a number to enter a power of ten: 1.2e6 means 1.2 × 10^6 and 3e-2 means 0.03. An exponent marker must be followed by exponent digits.

Roots, logs, and factorials

sqrt(x) requires x ≥ 0. cbrt(x) accepts real values. root(x,n) requires a whole-number degree from 2 through 99, and negative x is supported only for odd n. ln(x) and log(x) require x > 0. Factorial requires a whole number from 0 through 170.

Ans, memory, and History

Ans stores the raw value from the previous successful calculation. M+ and M− add or subtract the current successful result from memory, MR inserts the memory value, and MC clears memory. History keeps up to 25 successful calculations. Errors do not overwrite Ans, memory, or successful History.

Copy and privacy

Copy result copies the displayed result. Copy calculation includes the expression, angle mode, and displayed result. Calculator work stays in the active page; no app-owned cloud history or recovery service is created. Reloading or closing the page clears Ans, memory, and History.

Precision and scope

The engine uses standard JavaScript double-precision floating-point numbers. Some decimal and transcendental values are approximate. The app supports real-number calculations only and is not an arbitrary-precision, complex-number, graphing, symbolic algebra, or exam-certification tool.