About
The Graphing Calculator is an original, browser-based math tool for graphing functions and exploring mathematics. It is an independent implementation — built from scratch, not derived from any other graphing product.
What it does today: plot Cartesian functions, parametric curves, polar equations, and inequalities on an interactive canvas graph with zoom, pan, and touch support; analyze expressions with real numerical methods (roots via Brent’s method, derivatives via central differences, integrals via adaptive Simpson’s rule, tables, tangent lines); animate parameters with variables and sliders; get plain-English help from an AI assistant that issues calculator commands while the math engine does the actual computing; and save, share, import, and export graph states.
About the creator
How your data is handled
Everything runs on your device. Graphs you save are stored in your browser’s local storage; share links encode the graph state in the URL itself. There are no accounts, and no personal data is sent to a server by the calculator. The site uses Google Analytics to measure aggregate usage (see the privacy policy). AI assistant requests go to the configured AI provider only when you use the assistant.
Honesty about results
Numerical methods are approximations, and the calculator says so where it matters: when a root, derivative, or integral cannot be computed — a corner, a jump, a singularity — the tool reports that honestly instead of returning a misleading number.
How we review content
Every guide on this site is checked for mathematical accuracy before it is published. The mathematical facts in each guide — roots, domains, example values — are verified against the site’s own expression engine, the same code that powers the calculator, so what you read matches what the tool computes.
A human reviewer on the Graphing Calculator team then reads each guide for clarity and correctness. When an error is found — a wrong sign, a misleading example, a step that skips too much — it is corrected before the guide goes live, and the guide carries a “Last reviewed” date so you can see when that check happened.