Use equations for formulas
Enter a mathematical rule when you want the tool to calculate the curve, such as a parabola or sine wave.
Equation Graph Maker
Enter an equation and plot its curve directly. Compare up to eight functions, adjust the coordinate plane, and download your graph as PNG or SVG.
- Free to use
- No watermark
- No signup
- Data stays in your browser
Graph editor
Loading your locally saved graph…
Equations
Enter y = f(x). Use x, pi, e, + − * / ^, parentheses, sin, cos, tan, sqrt, abs, ln, log or log10. ln and log mean natural logarithm.
Calculating graph…
How to graph an equation
- 1
Enter an equation
Type y = 2x + 3, y = x², or sin(x). Add more equations to compare their curves.
- 2
Choose your view
Open Customize to adjust bounds, zoom, pan, grid spacing and colors. Reset axes to return to the initial view.
- 3
Download your graph
Export PNG or SVG after the graph finishes calculating, or print the graph.
Graph a function from its equation
An equation graph maker calculates points from an expression of the form y = f(x), then draws the curve on numeric X and Y axes. You do not need to calculate a table first.
This tool supports arithmetic, powers, parentheses and common real-valued functions. It samples the visible X range and leaves gaps where values are undefined or a segment cannot be resolved within its sampling limit.
A linear equation example
For y = 2x + 3, these known values lie on the plotted line.
| X | Y |
|---|---|
| -2 | -1 |
| 0 | 3 |
| 2 | 7 |
Equation graphs or XY data?
Choose a tool based on the information you already have.
Use XY for measurements
Use XY Graph Maker when you already have coordinate pairs, experimental observations or a spreadsheet table.
Equation graph maker features
Direct equation input
Plot up to eight expressions with separate colors and visibility controls.
Coordinate axes
Control bounds, grid intervals and equal unit scale.
Zoom and pan
Explore the graph with chart gestures or accessible buttons in Customize.
Local processing
Expressions are calculated in your browser and saved on this device.
PNG and SVG export
Download the current graph view without a watermark.
Related graph makers
Equation graph maker FAQ
Supported expressions, graph accuracy and local saving.
Which equations can I graph?
Explicit functions y = f(x), such as y = 2x + 3, x^2 - 4, and sin(x). Implicit equations, inequalities, parametric plots and symbolic solving are not supported.
Which functions and notation are supported?
Use +, -, *, /, ^, parentheses, x, pi, e, sin, cos, tan, sqrt, abs, exp, ln, log and log10. Implicit multiplication such as 2x and superscripts ² and ³ are supported. Trigonometry uses radians; ln and log are natural logarithms.
Why does a curve have gaps?
Some functions are undefined in parts of their domain, such as 1/x at zero or sqrt(x) for negative X. The tool also leaves gaps when it reaches its sampling limit instead of connecting uncertain segments.
Are my equations uploaded?
No. Equation calculation and local saving happen in your browser. Export a project file if you need a portable backup.