Scientific calculator online

What it does and when to use it

Solve expressions with powers, roots, logarithms and trigonometric functions. Choose degrees or radians, use π and e, and combine functions with parentheses and arithmetic. Calculations run in your browser without registration.

Degrees, radians and inverse functions

DEG interprets angles in degrees: sin(30) = 0.5 and cos(60) = 0.5. RAD interprets them in radians: sin(pi/6) = 0.5. The asin, acos and atan functions return angles in the selected unit.

Changing DEG/RAD invalidates the current result: press Calculate or Enter to recalculate. History shows the mode used for each expression. Tangent at 90° and equivalent angles is undefined.

Powers, roots, logarithms and factorials

Use ^ for powers, sqrt for square roots and cbrt for cube roots. Examples: 2^3 = 8, sqrt(81) = 9 and cbrt(-8) = -2. Powers associate to the right: 2^3^2 = 512. An outer minus applies after the power: -2^2 = -4, while (-2)^2 = 4.

log is base 10 and ln is the natural logarithm: log(100) = 2 and ln(e) = 1. Factorial ! accepts integers from 0 to 170, with 0! = 1 and 5! = 120. Functions operate over real numbers; negative square roots and logarithms of nonpositive numbers display an error.

Percentages, precision and privacy

In the scientific calculator, % always means division by 100: 200 × 15% = 30 and 200 + 15% = 200.15. For a 15% increase use 200 × (1 + 15%) = 230. Use the basic calculator for relative percentage behavior. Implicit multiplication is supported: 2π and 2(3+4).

Use a dot or comma as the decimal separator without thousands separators. Expressions can contain 240 characters; results are rounded to 14 significant digits using browser numeric arithmetic, without symbolic calculations or complex numbers. History holds eight expressions in page memory and disappears on reload. Your expressions and results stay only on this page.

Limits and checks

• Use DEG for angles in degrees, such as sin(30). Use RAD for radians, such as sin(pi/6). After switching modes, press Calculate again.