Equation Grapher | gCalcD

Welcome to the gCalcD Equation Grapher, the only online equation grapher that graphs any well-defined equation (and level curves) in Cartesian and polar coordinate systems, and it's free!

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

■ To use the equation grapher select Cartesian (default) or Polar Coordinate System.

■ To graph an equation type in its expression and press Draw Graph (or press Enter on the keyboard). Syntax

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

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Instruction Tips

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

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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

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Two-Variable Function Grapher

Note: This Equation Grapher graphs any well-defined equation in x and y (or in θ and r). If an equation is in the form y = f(x) (or r = f(θ)), use the Function Grapher instead. It graphs functions almost instantly and it's more accurate in graphing functions.

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To use this sophisticated, easy-to-use online equation graphing calculator you need to download Java from Java.com, it's free. Below are images of Equation Grapher (Online Equation Graphing Calculator). Already have Java? Trouble-shooting

Equation Grapher Online

Equation Grapher, axis rotated

Equation Grapher - Polar
Equation Grapher - Polar, axis rotated

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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 - Equations:

x = 3y^2-4y-2  parabola

x^2-3xy-2y^2+4x+2y-2 = 0  hyperbola

sin(2x) = sin(2y)  Graph it!

sin(x) = sin(xy)  Graph it!