Free scientific calculator

Scientific calculator

Powers, roots, trigonometry and statistics, with a full expression you can review.

Result

—

Memory: 0

How to enter a calculation

Use * for multiplication: 2*pi or 2*(3+4). Powers bind before a leading minus: -2^2 = -4. Powers associate to the right: 2^3^2 = 512. Parentheses make your intention explicit.

Percent divides its preceding value by 100: 200*10% = 20. 200+10% = 200.1. It does not automatically add ten percent to 200.

DEG uses degrees for sin, cos, tan and their inverses; RAD uses radians. Hyperbolic functions are dimensionless and independent of angle mode.

Functions: sqrt, cbrt, root(value,index), abs, exp, ln (natural), log (base 10), log2, floor, ceil, round, sin, cos, tan, asin, acos, atan, sinh, cosh, tanh, asinh, acosh, atanh, ncr(total,chosen), npr(total,chosen), fact. Factorials and selections support whole numbers through 170. round uses ties toward positive infinity.

Use pi, e, ans (last valid answer), or m (memory). Scientific notation is accepted: 1.2e-3.

Session history

The last 20 calculations stay in this tab until you reload or clear them. Select an entry to reuse its expression; check the current angle mode.

Basic statistics

Precision and limits

Results use standard browser floating-point arithmetic, typically about 15 significant decimal digits. Fractions are approximations of the numerical result with a denominator up to 10,000; they are not exact symbolic answers. Very large, tiny or nearly cancelling values can lose accuracy. Nonfinite results and invalid real-number domains produce an explanation.

This is a real-number scientific calculator, without graphing, symbolic algebra, complex numbers or arbitrary-precision arithmetic. It cannot replace a required approved physical calculator in an exam. Inputs, memory and history stay in this tab and are not sent to a server.

Function reference: MDN mathematical functions and number precision. Check angle modes and independently verify consequential results.

Try the worked example sin(30)^2 + cos(30)^2 in DEG mode: the result is 1, within floating-point rounding.