Free math tool

Scientific calculator

Evaluate a typed expression with common scientific functions—without sending it to a server.

1Build the expression

Type an expression or use the insert buttons. Nothing is prefilled as if it were your calculation.

Use explicit multiplication such as 2*pi. In this scientific parser, % means remainder—not “percent of.”

2Choose how to interpret and display it

Angle mode affects trigonometric functions. Decimal places round only the displayed final result.

Scientific expressions in ordinary notation

Enter numbers, parentheses, functions, constants, and explicit operators. Powers use the caret, so 2^8 equals 256. The percent sign is the remainder operator, not a percentage shortcut. Factorial follows a non-negative whole number or expression, such as 5! or (3 + 2)!. Multiplication must be written explicitly: use 2*pi rather than 2pi.

Degrees and radians

The selected angle mode affects sin, cos, tan, and their inverse functions. In degree mode, sin(30) is 0.5. In radian mode, sin(pi/6) gives the same mathematical value. Log means base 10, while ln is the natural logarithm. Square roots and logarithms reject inputs outside their real-number domains.

Order of operations and precision

Parentheses are evaluated first, followed by factorials, powers, unary signs, multiplication or division, and addition or subtraction. Powers associate from right to left, so 2^3^2 means 2^(3^2). Calculations use JavaScript double-precision floating-point arithmetic; the display setting rounds the final finite result, not every intermediate step.

Choose the calculator that matches the task

Use the percentage calculator for “percent of,” share, or percentage-change questions; the percent sign here is the remainder operator. Use the standard deviation calculator for a documented data set, or the graphing calculator when the shape of one or more functions matters.

This is a real-number calculator, not a computer algebra system. It does not solve equations, manipulate symbols, accept implicit multiplication, or guarantee exact decimal representation. Verify consequential engineering, financial, or scientific work with an appropriate specialist tool.