Function grapher — plot y = f(x) online free
Type an equation like sin(x), x^2, 1/x, ln(x) or e^x and see the graph instantly. Plot several functions together, zoom with the scroll wheel, drag to move, read values under the cursor and save the graph as an image.
We're not interested in your data. A platform built free from surveillance.
Scroll to zoom, drag to move. Use x as the variable: 2x^2-3x+1, sin(x)/x, sqrt(x), ln(x), |x|, e^x, pi.
Writing expressions
Use x as the variable. You can skip the multiplication sign (2x^2-3x+1) and use ^ for powers. Available: sin cos tan, sqrt, abs or |x|, ln (natural log), log (base 10), exp, e and pi.
Plot up to six functions in different colours to compare shapes and intersections.
Advertisement
Zoom, pan and read values
Scroll to zoom, drag to move and hover to read each function's value at that x. Type an exact range, or use Equal scale so circles and slopes keep their true shape.
Put it in your report
Copy image puts a high-resolution graph with a white background on your clipboard, ready to paste into Word, Docs or slides. You can also download PNG or SVG.
Frequently asked questions
Does it handle graphs like tan(x)?
Yes. The line is broken where the function jumps to infinity.
Are trig functions in radians?
Yes. For degrees, write sin(x*pi/180).
Can it plot implicit or parametric curves?
Not yet — it plots functions of the form y = f(x).
Advertisement