Free Function GrapherType a function, see its graph and key points.

Plot one or many functions of x as you type, with zoom, pan and trace.
Tap a curve to mark its zeros, highs and lows, and where it crosses the others.

Instant plotsKey pointsPNG export

No sign-up Unlimited use Remembers your numbers

Calculated on your device. What you type is not sent anywhere.

THREE SIMPLE STEPS

How to use the Function Grapher

Type a function

Enter y = x^3 − 3x, sin(x)/x or 2^x; add more on new lines.

Find the key points

Tap a curve to mark zeros, maximums, minimums, the y-intercept and intersections.

Save or share

Copy a link to the graph, copy a table of values or download a PNG.

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Function Grapher FAQ

Which functions can I plot?

Polynomials, fractions, roots, powers, exponentials, logarithms, trigonometric and hyperbolic functions, absolute value, floor, round, min and max, and your own functions defined as f(x) = ….

How are asymptotes handled?

Curves break where the function jumps or goes to infinity, as with tan x or 1/x, so no false lines join the pieces.

Can I find where two functions meet?

Yes. Tap one curve and the crossings with every other function in view are marked and listed with their coordinates.

Can I plot a derivative?

Yes. Define f(x) = … on one line and type f'(x) or f''(x) on another to draw the first or second derivative.

Is it free?

Yes. Free, no sign-up, no watermark, and it runs in your browser.

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