Scientific Calculator a free and easy-to-use scientific calculator that supports many advanced features, including unit conversion, equation solving, and surprisingly complex-number math. Free online calculator is presented as both a free online scientific calculator

The addition (sum function) is used by clicking on the "+" button or using the keyboard. The function results in a+b.

The subtraction (minus function) is used by clicking on the "-" button or using the keyboard. The function results in a-b.

The multiplication (times function) is used by clicking on the "x" button or using the keyboard "*" key. The function results in a*b.

The division (divide function) is used by clicking on the "/" button or using the keyboard "/" key. The function results in a/b.

The sign key (negative key) is used by clicking on the "(-)" button. The function results in -1*x.

The square function is used by clicking on the "x^2" button or type "^2". The function results in x*x.

The square root function is used by clicking on the "x" button or type "sqrt()". This function represents x^.5 where the result squared is equal to x.

The Sine (SIN) function is used by clicking on the "SIN" button or type "SIN()". The result is the ratio of the length of the opposite side to the length of the hypotenuse of a right triangle.

The Inverse Sine (ASIN or ARCSIN) function is used by clicking on the "ASIN" button or type "ASIN()". The result is valid only from -pi/2 to pi/2.

The Cosine (COS) function is used by clicking on the "COS" button or type "COS()". The result is the ratio of the length of the adjacent side to the length of the hypotenuse of a right triangle.

The inverse cosine (ACOS or ARCCOS) function is used by clicking on the "ACOS" button or type "ACOS()". The result is valid only from 0 to pi.

The Tangent (TAN) function is used by clicking on the "TAN" button or type "TAN()". The result is the ratio of the length of the opposite side to the length of the adjacent side of a right triangle.

The inverse tangent (ATAN or ARCTAN) function is used by clicking on the "ATAN" button or type "ATAN()". The result is valid only from -pi/2 to pi/2.

The cosecant (CSC) function is used by typing "CSC()". The cosecant is the multiplicative inverse of the sine function.

The inverse cosecant (ACSC) function is used by typing "ACSC()". The result is only valid from -pi/2 to pi/2 excluding 0.

The secant (SEC) function is used by typing "SEC()". The secant is the multiplicative inverse of the cosine function.

The inverse secant (ASEC) function is used by typing "ASEC()". The result is only valid from 0 to pi excluding pi/2.

The cotangent (COT) function is used by typing "COT()". The cotangent is the multiplicative inverse of the tangent function.

The Inverse Cotangent (ACOT) function is used by typing "ACOT()". The result is only valid from 0 to pi.