Function Grapher — Plot y = f(x)
Plot y = f(x) for any expression over a custom range — powers, trig, logs, roots. Client-side.
How to use
- 1 Type a function of x, e.g. x^2 - 4, sin(x), or 2*x + 1.
- 2 Set the x range to zoom in or out.
- 3 The graph redraws as you type.
Why use this tool
- Plot any single-variable function instantly.
- Supports powers, trig, logs, roots, π and e.
- Runs entirely in your browser.
Frequently asked questions
What functions can I plot?
Any expression in x using + − × ÷, ^ (powers), parentheses, and functions like sin, cos, tan, ln, log, sqrt, abs, exp, plus the constants π (pi) and e.
Do I need to write the multiplication sign?
Usually no — 2x and 3(x+1) are understood. When in doubt, write * explicitly (2*x).
How is the curve drawn?
The function is sampled at 500 points across the x range and connected; gaps appear where the function is undefined (e.g. dividing by zero).
Can I plot trigonometric functions?
Yes — sin(x), cos(x), tan(x) and their inverses. Angles are in radians.
What is Function Grapher?
A function grapher plots the graph of a single-variable function y = f(x) over a chosen x range, supporting polynomials, trigonometric, logarithmic and exponential expressions.
Function Grapher is a free math utility by Zerethon Tools. Plot y = f(x) for any expression over a custom range — powers, trig, logs, roots. Client-side. Runs entirely in the browser — no signup, no upload.
- Category
- Math
- Pricing
- Free
- Privacy
- Browser-based
- Signup
- Not required
Privacy
Your data never leaves your browser unless explicitly stated. Function Grapher runs entirely client-side — no server upload, no logging, no tracking of your input.
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