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The online calculator operates in either algebraic input default mode or RPN input. Algebraic input mode is commonly referred to as "infix notation" and is widely used by most handheld calculators. Expressions entered in algebraic input mode are done in a manner that closely resembles the natural form of the expression and the order of the operations is determined by operator precedence and parenthesis.

RPN, which stands for Reverse Polish notation, is a stack-based notation where operators are designed to follow their operands. The online calculator supports data entry through either a graphical button or through the use of traditional computer keyboard keys. The user is given the option to use either input method and both are equally valid; however, there are some trigonometric function as noted below that are limited to computer keyboard entry only since there is a limited amount of space available for graphical button placements.

The stack is a feature of the calculator that provides a way to view a history of results. The stack displays only 4 items at once, but one can scroll up and down the stack by clicking on the up and down arrow above the stack. Values in the stack can also be "popped" down into the input field of the calculator by clicking on the down arrows to the left of the line in the stack. The calculator is divided into two sections the scientific calculator interface on the left and the calculator pallet on the right.

The pallet provides a display area for special features. Some of these features include: Unit Converter, Constants Library, Equation solver, Polynomial Solver, Base Conversion, and Decimal to Fraction Conversion. The subtraction minus function is used by clicking on the "-" button or using the keyboard. The function results in a-b. The sign key negative key is used by clicking on the " - " button. The square root function is used by clicking on the "x" button or type "sqrt ".

The result is e 2.

Numbers with exponents of 10 are displayed with an "e", for example 4. Numbers are automatically displayed in the format when the number is too large or too small for the display.

To enter a number in this format use the exponent key "EEX". To do this enter the mantissa the non exponent part then press "EEX" or type"e" and then enter the exponent. 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 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 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 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 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. There are 4 types of number formats available and the format can be changed by clicking on the "Menu" button. The number types available are standard, fixed, scientific, and engineering. In engineering one can select the number of digits to display in the input box on the format line.

The number format in use can be seen above the stack and is the third menu status from the left. This location can be clicked on to change number format. There are 3 types of angle representation available and these angle types can be changed by clicking on the "Menu" button.

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The angle formats are radians, degrees, and gradients. The angle format can be seen above the stack and is the first menu status.

This location can be clicked on to change the angle format. There are two coordinate systems available to represent complex numbers. The coordinate systems are rectangular and polar. The coordinate system can be selected by clicking on the "Menu" button. The selected coordinate system can be seen above the stack and is the second menu status. To enter a number in rectangular format it must be entered in this format " 3,4 ".

To enter a number in polar format it must be entered in this format " 3 75 ". In place of the " " symbol the calculator keyboard angle symbol can be used. There are two online calculator modes Algebraic and RPN. The mode is selected by clicking on the "Menu" button.

The calculator mode is seen in the fourth menu status indicator, by clicking on this location the mode changes. The decimal to fraction feature of this calculator allows a decimal number to be represented in fractional estimates as well as the exact fraction equivalent. A display in the side pallet will open with an input box in the top. A decimal value can be typed directly in the input box, or by clicking on the input arrow the value from the calculator entry field will be input.

The online calculator fully supports complex numbers. Complex numbers are an extension of the real number system and include a second number that is imaginary creating a complex number plane. These numbers can also be represented as magnitude and angle when the calculator coordinate system is in polar mode. The online unit converter is displayed in the pallet and can be selected by clicking on the "Units" button.

The unit converter has 11 categories: Mass, Speed, Time, Power, Volume, Area, Length, Energy, Temp, Force, and Pressure. The constants library is a pallet feature than can be accessed by clicking on the "CONST" button.

To push a constant to the calculator input field just click on the constant. This library contains many of the popular constants that are used regularly. The Constants Library includes the following: Speed of Light, Coulomb constant, Acceleration of Gravity, Gravitational Constant, Planck's Constant, Boltzmann's Constant, Faraday Constant, Electron Rest Mass, Neutron Rest Mass, Proton Rest Mass, Avogadro's Number, Electron Charge, Bohr Radius, Molar Gas Constant, Rydberg constant, Molar Volume, Permittivity of a Vacuum, Stefan-Boltzmann Constant, Magnetic Flux Quantum, Permeability of a Vacuum, Bohr Magneton, Josephson Constant, Impedance of Vacuum, and Conductance Quantum.

The online calculator has two commonly used solvers. These solvers are accessed by clicking on the pallet button "SOLVE". The solvers available are Linear Solver and Root Solver. The Linear Solver is selected by choosing one of the 4 choices. This solver allows one to solve for variables when there are an equal number of equations that are unique for each unknown variable.

The solver requires that the coefficients of the equations are entered. When entering the variable numbers make sure that each entry within a column is used for the same variable.

Complex number coefficients can be entered, once all values are entered in click on the "Solve" button. The results are labeled x X1 corresponds to the variable used in column 1 and x2 column 2 and so on. The polynomial solver root solver is selected by clicking the appropriate order of equation. The coefficients are entered in the input boxes below.

Then click on solve and the results are the roots of the equation. The base converter is a feature that is included in the pallet and can be accessed by clicking on the "BASE" button. This pallet feature provides different number base equivalents to be viewed at the same time. The bases that are supported are binary, octal, decimal, and hexadecimal.

A number can be entered into any of the number bases and the others will change automatically.

By clicking on the input arrow next to the decimal input box the decimal number in the calculator input field will be evaluated. The binary display can be modified by clicking on a "1" or "0" and it will toggle states.

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Scientific Calculator Back to Tools page. Format Angle Coord Mode Color. Download eCalc Scientific Calculator Windows Version Mac OSX Version View More Downloads Online Calculator and Math Help Button and Key Support Stack Pallet Intro Basic Functions Addition Subtraction Multiplication Division Sign Square Square Root Raise to the Power Natural Exponential Logarithm Natural Logarithm Inverse Exponent Factorial PI Online Trigonometric Functions Sine Inverse Sine Cosine Inverse Cosine Tangent Inverse Tangent Cosecant Inverse Cosecant Secant Inverse Secant Cotangent Inverse Cotangent Online Hyperbolic Trigonometric Functions Hyperbolic Sine Hyperbolic Cosine Hyperbolic Tangent Hyperbolic Cosecant Hyperbolic Secant Hyperbolic Cotangent Inverse Hyperbolic Sine Inverse Hyperbolic Cosine Inverse Hyperbolic Tangent Inverse Hyperbolic Cosecant Inverse Hyperbolic Secant Inverse Hyperbolic Cotangent Menu Format Angle Coordinate System Online Calculator Modes Coordinate System Decimal To Fraction Complex Numbers Online Unit Converter Constants Library Online Solver Base Converter.

Input Mode Algebraic vs. RPN The online calculator operates in either algebraic input default mode or RPN input. Algebraic Mode Algebraic input mode is commonly referred to as "infix notation" and is widely used by most handheld calculators. Subtraction The subtraction minus function is used by clicking on the "-" button or using the keyboard.

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Sign The sign key negative key is used by clicking on the " - " button. Square Root The square root function is used by clicking on the "x" button or type "sqrt ". Logarithm The logarithm LOG is used by clicking on the "LOG" button or type "LOG ". Natural Logarithm The Natural logarithm LN is used by clicking on the "LN" button or type "LN ".

Exponent Numbers with exponents of 10 are displayed with an "e", for example 4. Factorial The Factorial function is used by clicking the "! PI PI is a mathematical constant of the ratio of a circle's circumference to its diameter.

Sine The Sine SIN function is used by clicking on the "SIN" button or type "SIN ". Inverse Sine The Inverse Sine ASIN or ARCSIN function is used by clicking on the "ASIN" button or type "ASIN ".

Cosine The Cosine COS function is used by clicking on the "COS" button or type "COS ". Inverse Cosine The inverse cosine ACOS or ARCCOS function is used by clicking on the "ACOS" button or type "ACOS ". Tangent The Tangent TAN function is used by clicking on the "TAN" button or type "TAN ".

Inverse Tangent The inverse tangent ATAN or ARCTAN function is used by clicking on the "ATAN" button or type "ATAN ". Cosecant The cosecant CSC function is used by typing "CSC ". Inverse Cosecant The inverse cosecant ACSC function is used by typing "ACSC ". Secant The secant SEC function is used by typing "SEC ". Inverse Secant The inverse secant ASEC function is used by typing "ASEC ". Cotangent The cotangent COT function is used by typing "COT ".

Inverse Cotangent The Inverse Cotangent ACOT function is used by typing "ACOT ". Hyperbolic Sine The hyperbolic sine SINH function is used by typing "SINH ". Hyperbolic Cosine The hyperbolic cosine COSH function is used by typing "COSH ". Hyperbolic Tangent The hyperbolic tangent TANH function is used by typing "TANH ". Hyperbolic Cosecant The hyperbolic cosecant CSCH function is used by typing "CSCH ".

Hyperbolic Secant The hyperbolic secant SECH function is used by typing "SECH ". Hyperbolic Cotangent The hyperbolic cotangent COTH function is used by typing "COTH ". Inverse Hyperbolic Sine The inverse hyperbolic sine ASINH function is used by typing "ASINH ". Inverse Hyperbolic Cosine The inverse hyperbolic cosine ACOSH function is used by typing "ACOSH ". Inverse Hyperbolic Tangent The inverse hyperbolic tangent ATANH function Is used by typing "ATANH ".

Inverse Hyperbolic Cosecant The inverse hyperbolic cosecant ACSCH function is used by typing "ACSCH ". Inverse Hyperbolic Secant The inverse hyperbolic secant ASECH function is used by typing "ASECH ". Inverse Hyperbolic Cotangent The inverse hyperbolic cotangent ACOTH function is used by typing "ACOTH ". Format There are 4 types of number formats available and the format can be changed by clicking on the "Menu" button.

Angle There are 3 types of angle representation available and these angle types can be changed by clicking on the "Menu" button. Coordinate System There are two coordinate systems available to represent complex numbers. Online Calculator Modes There are two online calculator modes Algebraic and RPN. Linear Solver The Linear Solver is selected by choosing one of the 4 choices. Polynomial Solver The polynomial solver root solver is selected by clicking the appropriate order of equation. EEWeb RSS Feeds Electronics News Return to Zero Comics Electronics Quizzes Engineering Jobs Engineering Events Featured Engineers EEWeb Articles Design Notes Featured Websites EEWeb Forum EEWeb Projects.