3D Graphing Calculator
Plot a surface z = f(x, y) in interactive 3D — rotate and zoom, free online.
Drag the surface to rotate. e.g. x^2-y^2, sin(x)*cos(y), sqrt(x^2+y^2)
About this calculator
A 3D graphing calculator plots a surface defined by z = f(x, y) as a rotatable wireframe. Enter an expression in x and y, such as sin(x) * cos(y) or x^2 - y^2, and drag to orbit the surface in three dimensions. Useful for visualising multivariable functions, saddle points and peaks.
Frequently asked questions
How do I enter a 3D function?
Type an expression in both x and y, for example x^2 - y^2 or sin(x)*cos(y). The calculator evaluates it across a grid and draws the resulting surface.
Can I rotate the surface?
Yes. Drag the surface to orbit it, and use the zoom control to move closer or further away.
Results are estimates for general guidance only, not financial, medical or tax advice.