Graphing Calculator
Use the free online Graphing Calculator to plot multiple functions, zoom and pan around a graph, trace coordinates, generate value tables and estimate roots, intercepts, intersections, minima and maxima. It works directly in your browser without an account or software installation.
Drag the graph to pan. Scroll or use +/− to zoom. Move the pointer across the graph to trace the first active function.
| x | x^2 | sin(x) |
|---|---|---|
| -10 | 100 | 0.54402111 |
| -9 | 81 | -0.41211849 |
| -8 | 64 | -0.98935825 |
| -7 | 49 | -0.6569866 |
| -6 | 36 | 0.2794155 |
| -5 | 25 | 0.95892427 |
| -4 | 16 | 0.7568025 |
| -3 | 9 | -0.14112001 |
| -2 | 4 | -0.90929743 |
| -1 | 1 | -0.84147098 |
| 0 | 0 | 0 |
| 1 | 1 | 0.84147098 |
| 2 | 4 | 0.90929743 |
| 3 | 9 | 0.14112001 |
| 4 | 16 | -0.7568025 |
| 5 | 25 | -0.95892427 |
| 6 | 36 | -0.2794155 |
| 7 | 49 | 0.6569866 |
| 8 | 64 | 0.98935825 |
| 9 | 81 | 0.41211849 |
| 10 | 100 | -0.54402111 |
How to use the Graphing Calculator
- Enter one or more functions using x, such as x^2, sin(x), 2*x+3 or log10(x). You may also type y = before an expression.
- Each function is drawn separately so multiple equations can be compared on the same coordinate plane.
- Drag the graph to pan and use the zoom controls or mouse wheel to change the visible graph window.
- Switch between RAD and DEG when working with trigonometric functions.
- Use the Table view to compare numerical x and y values for active functions.
- Use Analyze to estimate roots, y-intercepts, intersections and visible minimum or maximum values within the current graph window.
- Move the pointer over the graph to trace coordinates on the first active function.
- Use the built-in scientific calculator for arithmetic, trigonometry, logarithms, roots and powers without leaving the page.
- Graph settings and equations are stored locally in the browser so the workspace can be restored during later visits.
Examples
Graph a parabola
Enter x^2 to graph y = x². The graph has a vertex at (0, 0), is symmetric about the y-axis and opens upward.
Graph a straight line
Enter 2*x+3 to graph y = 2x + 3. The slope is 2 and the y-intercept is 3.
Compare two functions
Graph x^2 and 2*x+3 together. Use Analyze to estimate where the two graphs intersect in the current viewing window.
Graph a sine wave
Enter sin(x) in RAD mode to plot the standard sine function. Switch to DEG when the x-values should represent degrees.
Graph an exponential function
Enter 2^x to see exponential growth. Negative x-values approach zero while positive x-values increase rapidly.
Graph a logarithmic function
Enter log10(x) to graph the common logarithm. The function is defined only for positive x-values.
Frequently asked questions
Is the Graphing Calculator free to use?
Yes. You can use the tool without creating an account.
What is a graphing calculator?
A graphing calculator plots mathematical functions on coordinate axes and lets you explore how y changes as x changes. More advanced graphing calculators can also show tables and estimate important points such as roots, intercepts and intersections.
How do I graph an equation online?
Enter the right side of the equation as a function of x. For example, enter x^2 for y = x² or 2*x+3 for y = 2x + 3. The graph updates automatically.
Can I graph more than one function?
Yes. Add multiple functions to compare them on the same graph. Each active function is drawn separately.
How do I find an x-intercept or root?
An x-intercept occurs where y = 0. The Analyze view numerically estimates roots that appear inside the current graph window.
How do I find the y-intercept?
The y-intercept is the function value when x = 0. The Analyze view reports the y-intercept when x = 0 is visible and the function is defined there.
How do I find where two graphs intersect?
Plot both functions and open Analyze. The calculator searches numerically for locations where the active functions have approximately the same y-value.
What does trace do?
Trace lets you inspect approximate coordinates on a plotted function. Move across the graph to see the x and y values of the first active function.
What is the graph window?
The graph window is the visible x and y range. Changing X min, X max, Y min or Y max changes which portion of the coordinate plane is displayed.
What is the difference between DEG and RAD?
DEG treats trigonometric angle inputs as degrees, while RAD treats them as radians. Standard mathematical function graphs are commonly viewed in radians.
Can the calculator show a table of values?
Yes. The Table view shows x-values and corresponding y-values for every active function using a configurable step size.
Does this graphing calculator work on phones?
Yes. The interface is mobile-first and separates Graph, Calculator, Table and Analyze views so the graph and controls remain usable on small screens.
Is this a TI-84 calculator?
No. QuickToolCenter provides an independent graphing calculator with its own interface and implementation. It is not a Texas Instruments product or emulator.
What is the difference between the graphing calculator and the scientific calculator?
The scientific calculator focuses on evaluating numerical expressions. The graphing calculator additionally plots functions, displays value tables and analyzes visible graph features.
Are roots, intersections, minima and maxima exact?
Analysis results are numerical estimates based on the currently visible graph window. They are useful for exploration but should not be treated as symbolic proofs or exact algebraic solutions.
Does this tool work on a phone?
Yes. The interface is designed to work on phones, tablets and desktop browsers.
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