Graphing Calculator
Plot mathematical functions interactively. Find zeros, extrema, and intersections. Supports trig, exponential, logarithmic, and polynomial functions.
Formula:y = f(x)
Functions
f(x): (empty)
Graph
Functions
f(x)
Window Settings
Functions
f(x): (empty)
Graphing Practice Problems
Test your skills with practice problems
Practice with 5 problems to test your understanding.
What is a Graphing Calculator?
A graphing calculator is a tool that plots mathematical equations on a coordinate plane. It converts algebraic expressions into visual representations, making it easier to understand function behavior, identify key features like intercepts and extrema, and solve equations graphically.
A graphing calculator plots mathematical functions visually to help you understand their behavior. Use our free online grapher to visualize any function like y = x^2, y = sin(x), or y = e^x. You can plot multiple functions, zoom in/out, find zeros, maxima, minima, and intersection points.
Key Features
- •Plot up to 10 functions simultaneously with different colors
- •Use standard math notation: x^2, sqrt(x), sin(x), log(x), e^x
- •Interactive pan and zoom to explore any region of the graph
- •Find zeros (x-intercepts) where the function crosses the x-axis
- •Find local maxima and minima (turning points)
- •Find intersection points between two functions
- •Supports trigonometric, exponential, logarithmic, and polynomial functions
- •Export graphs as images for reports and presentations
Frequently Asked Questions
How do I enter a function?
Use standard mathematical notation. For example: x^2 for x squared, sqrt(x) for square root, sin(x) for sine, e^x for exponential, log(x) for natural log. Use * for multiplication when needed (e.g., 2*x).
Can I graph multiple functions at once?
Yes! Click "Add Function" to add up to 10 functions. Each function will be displayed in a different color. You can toggle visibility for each function individually.
How do I find where a function equals zero?
Click the "Find Zeros" button to automatically locate all x-intercepts (points where y = 0) within the visible range. These are the roots of your equation.
What functions are supported?
We support arithmetic (+, -, *, /, ^), trigonometric (sin, cos, tan, asin, acos, atan), exponential (e^x, exp), logarithmic (log, log10, log2), and special functions (sqrt, abs, floor, ceil).
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How this works
Formulas follow standard definitions from the NIST Digital Library of Mathematical Functions and classical textbook derivations. Calculations run entirely in your browser. Where a closed-form solution exists, it is used; where an iterative or numerical method is required, the implementation is named on the page.
Sources
- [1]NIST Digital Library of Mathematical FunctionsAcademicdlmf.nist.govAccessed Apr 21, 2026
Joseph OrdunaFounder & Software Engineer
Full-stack software engineer specializing in embedded systems, web architecture, and AI/ML. Founder of Practical Web Tools. Built the gesture-controlled drone IP acquired by KD Interactive (Aura Drone, sold on Amazon).
Functions
f(x): (empty)