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Online Function Grapher Hosted by Yahoo!

Function Grapher - Cartesian & Polar| gCalcD

Welcome to the world's most advanced Online 2D Function Grapher. Graph, solve, differentiate. Sophisticated, easy to use, and it's free!.

Online function grapher for graphing functions, y = f(x), in the Cartesian and Polar coordinate systems.
To graph equations in the form g(x,y) = f(x,y) use the general Equation Grapher.

To use this online function grapher select Cartesian (default) or Polar Coordinate System.

To graph a function type in its expression and press Draw Graph (or press Enter on the keyboard). Syntax

To graph two or more functions on the same coordinate plane first press Draw Multiple Graphs...Quick Start

Basic Function Grapher
for beginners

Why donate?
Instruction Tips

To find zeros of f(x) press Solve f(x) = 0.
Solving Equations

To calculate derivatives press Find f'(x)....
Calculating Derivatives

sqrt(x), abs(x), sin(x),
asinh(x), floor(x), ln(x),
log(x), exp(x), more Predefined Functions


Try gCalcD, the world's most advanced Online Graphing Calculator
Graph functions, equations, parametric curves, point sets - Cartesian & Polar; find zeros (roots) of functions & derivatives

gCalcD simple graphers:

Function Grapher

Equation Grapher

Parametric Grapher

Point Plotter


Two-Variable Function Grapher 2 Variable Function Grapher

What is a function?

What is the graph of a function?

What is a coordinate system?

Note: To graph an equation in the general form such as xy^2 +2x^2 - 2x = 2x^3 + xy + 3y or cos(r) = 3sin(r+θ) use the Equation Grapher. It graphs any well-defined equation (and not just functions) in the Cartesian and Polar coordinate systems.


To use the world's most advanced online function graphing calculator you need to download Java from Java.com, it's free. Below are images of Function Grapher (Online Function Graphing Calculator). Already have Java? Trouble-shooting

Function Grapher Function Grapher Online


Function Grapher, axis rotated Function Grapher, axis rotated


Function Grapher - Polar Function Grapher - Polar


Function Grapher - Polar, axis rotated Function Grapher - Polar, axis rotated


Information for Mac, other non-Windows and non-IE users

Find out how to change the colors.

π: Ctrl+P or Alt+P or pi.
: Ctrl+8 or Alt+8 or infinity.
θ: Ctrl+T or Alt+T or theta. You can also use x or t instead of θ in polar mode; they will be replaced by θ when you press Draw Graph or Enter on the keyboard.

Using your mouse: change the scales and labelsNew, translate the origin and rotate the axes

Example - Functions:

f(x) = .7x^2-2x-1  parabola (Cartesian)

f(x) = 4sin(5x)  5-petal rose (polar)

f(x) = 1/(1-.7sin(x))  ellipse (polar)

f(x) = acos(x)  arc cos(x), inverse of cos(x)


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