📈 Graphing Calculator
Plot functions and see their graphs instantly — the way a TI-84 style graphing calculator does it. Type up to three functions of x, set your viewing window, and this free online graphing calculator draws the curves, lets you zoom in on interesting spots, trace exact values along each curve and build a table of values.
It is built for algebra, trigonometry and calculus homework: parabolas, sine waves, rational functions with asymptotes, exponentials and logs — all in your browser, on phone or desktop, with no sign-up and nothing to install.
Please note: This is a TI-84 type, web-based graphing tool designed and included in metacalculator.org.
We have put our best effort into building this calculator according to our own understanding of how a TI-84 style graphing calculator helps students learn — plotting functions, zooming, tracing values and building tables of values. Please try it and judge for yourself how successful we have been in this effort.
And please help us make it better: if you find any gap, missing feature or mistake, contact us at info@metacalculator.org. Your feedback will directly help us improve this calculator for every student who uses it.
How to use this calculator
Enter up to three functions, set the window, and press Graph. Then trace, zoom and tabulate.
- Type your functions in the y = boxes — for example x^2, 2*sin(x) or (x^2−1)/(x−1). Implied multiplication like 2x works, and angles are in radians.
- Set the window (Xmin, Xmax, Ymin, Ymax) or keep the standard −10 to 10 window, then press Graph.
- Use Zoom In to inspect a crossing or a turning point closely; Zoom Out and Reset Window bring you back.
- Trace any point: type an x value and press Trace, or click directly on the graph — the exact y value of every curve at that x is shown.
- Build the table of values with your own start and step to read off coordinates for sketching by hand.
Graphing Worked Example
Graph y = x^2 in the first box and y = sin(x) in the second, in the standard window. You will see the parabola in blue and the sine wave in red. The curves cross at x = 0 and again near x ≈ 0.88. Trace at x = 1 shows f₁(x) = 1 and f₂(x) = 0.8415 — at x = 1 the parabola is above the wave. Zoom in twice around x ≈ 0.88 and trace again to pin the crossing to about x = 0.8767, the positive solution of x² = sin(x).
Frequently asked questions
Is this a TI-84 calculator?
It works in the same style as a TI-84 graphing calculator — you type functions of x, see them plotted on a window you control, trace values along the curves and build a table of values, which covers the core of everyday graphing homework. It is an original web tool built for this site, not a ROM emulator of any device.
What can I type as a function?
Any expression in x using + − * / and ^ for powers, brackets, and the functions sin, cos, tan, asin, acos, atan, sinh, cosh, tanh, exp, ln, log (base 10), sqrt, cbrt and abs. The constants pi and e are supported, and multiplication can be implied — 2x, 3sin(x) and (x+1)(x−1) all work. Angles are in radians.
How do I find where two graphs cross?
Plot both functions, then use Trace: type an x value near the crossing, or simply click on the graph near it. The readouts show both functions' values at that x — where the two values are (nearly) equal, the curves cross. Zoom In around that spot to pin the crossing down to more decimal places.
Why does the graph of 1/x break in the middle?
Because 1/x is undefined at x = 0 and shoots to opposite infinities on each side — a vertical asymptote. The calculator detects the jump and deliberately does not join the two sides with a false line. The same happens at the asymptotes of tan(x).
How do I graph on a phone?
The graph is fully responsive and works in any modern phone browser — no app or sign-up needed. Use the window fields to set the range you need, tap Graph, and tap directly on the graph to trace. For trig graphs, a window of about −7 to 7 on x usually frames one or two full waves nicely.