FooPlot - Free Online Function Plotter

Plot 2D, 3D, polar, and parametric mathematical functions with our advanced graphing calculator

📚 Learn more: Getting Started FAQ 2D Plotting 3D Visualization Polar Coordinates Beautiful Equations View All Articles →

2D Plot (y = f(x)) 3D Plot (z = f(x,y)) Polar (r = f(θ)) Parametric (x(t), y(t))

Function:

r(θ) =

x(t) =

y(t) =

X Range: to

Y Range: to

θ Range: to

t Range: to

Share Your Plot

Copy this link to share your plot with others:

The link contains all your plot settings, functions, and ranges.

Function Reference & Help

📐 Plot Types

2D Plot (y = f(x)): Standard cartesian functions like y = x^2
3D Plot (z = f(x,y)): Surface plots like z = x^2 + y^2
Polar (r = f(θ)): Polar coordinate plots like r = 1 + cos(theta)
Parametric (x(t), y(t)): Parametric curves like x = cos(t), y = sin(t)

🔢 Supported Functions

Trigonometric

sin(x) - sine
cos(x) - cosine
tan(x), tg(x) - tangent
cot(x), ctg(x) - cotangent

Inverse Trigonometric

asin(x), arcsin(x) - arcsine
acos(x), arccos(x) - arccosine
atan(x), arctan(x), atg(x), arctg(x) - arctangent
acot(x), arccot(x), actg(x), arcctg(x) - arccotangent

Hyperbolic

sinh(x) - hyperbolic sine
cosh(x) - hyperbolic cosine
tanh(x) - hyperbolic tangent

Logarithmic & Exponential

log(x), log10(x), lg(x) - log base 10
ln(x) - natural log (base e)
log2(x), lb(x) - log base 2
log_n(x) - log base n (e.g., log_3(x), log_5(x))
exp(x) - e^x
sqrt(x) - square root

Other Functions

abs(x) - absolute value
sign(x) - sign function
floor(x) - floor function
ceil(x) - ceiling function
round(x) - round to nearest

🔣 Operators & Constants

Operators

+ - addition
- - subtraction
* - multiplication
/ - division
^ or ** - exponentiation
() - grouping

Constants

pi - π ≈ 3.14159
e - e ≈ 2.71828

💡 Examples

2D Functions

x^2 - parabola
sin(x) or tg(x) - trigonometric
log2(x) or log_3(x) - logarithms
exp(-x^2) - Gaussian
abs(x) - absolute value
arcsin(x) - inverse trigonometric

3D Functions

x^2 + y^2 - paraboloid
sin(x) * cos(y) - wave surface
sqrt(x^2 + y^2) - cone

Polar Functions

1 + cos(theta) - cardioid
sin(3*theta) - three-leaf rose
theta - spiral

Parametric Functions

x: cos(t), y: sin(t) - circle
x: t, y: t^2 - parabola
x: 2*cos(t), y: sin(t) - ellipse

⚡ Tips

Variables: Use x for 2D, x,y for 3D, theta for polar, t for parametric
Multiplication: Use * explicitly (e.g., 2*x not 2x)
Parentheses: Use them to control order of operations
Multiple Plots: Add multiple functions to compare and find intersections
Sharing: Use the "Share Plot" button to create shareable links

About FooPlot Function Plotter

FooPlot is a free online graphing calculator and function plotter that helps students, teachers, and professionals visualize mathematical functions. Our advanced plotting tool supports 2D cartesian graphs, 3D surface plots, polar coordinate graphs, and parametric equations.

Supported Function Types

2D Functions: Plot y = f(x) equations like polynomials, trigonometric, logarithmic, and exponential functions
3D Functions: Visualize z = f(x,y) surface plots and contour maps
Polar Plots: Graph r = f(θ) equations including roses, spirals, and cardioids
Parametric Curves: Plot x = f(t), y = g(t) parametric equations for complex curves

Key Features

Multiple plot overlay for function comparison
Interactive zoom and pan controls
Customizable axis ranges and resolution
Mathematical expression parser with advanced functions
Show/hide individual plots for analysis
Free to use with no registration required

Popular Mathematical Functions

Plot common functions including: sin(x), cos(x), tan(x), log(x), ln(x), sqrt(x), exp(x), x^2, x^3, 1/x, abs(x), and many more complex mathematical expressions.

Built with TypeScript, Plotly.js, and modern web technologies. Open source mathematical visualization tool.