Online TI-84 Calculator provides a free, browser-based simulator designed to help students practice with the familiar functions of TI-84 graphing calculators. Its interactive emulator supports calculations, function graphing, matrix algebra, statistical analysis, and regression work without requiring a download. Users can enter expressions with on-screen controls or a physical keyboard, view and trace graphs, adjust graph windows, and review calculation history. A separate Graphing Studio offers real-time plotting, dynamic zoom and pan, coordinate tracing, and root-finding features.

The site also provides educational resources for students preparing for algebra, AP Calculus, AP Statistics, the SAT, and the ACT. Its user guide and cheat sheet explain calculator keys, modes, shortcuts, fraction conversion, matrices, regressions, and exam-related memory resets. Additional tutorials cover clearing equations and lists, resetting calculator memory, and powering off physical devices. The website describes differences between TI-84 Plus and TI-84 Plus CE models and offers general guidance on batteries, chargers, pricing, and used calculators.