Is there a free TI-84 calculator online?

Yes—many tools emulate core TI-84 functions in your browser at no cost.

Does it work like a real TI-84 Plus/CE?

For common class tasks—graphing, tables, stats—yes. Advanced app behavior can vary by tool.

Does it work on mobile?

Most online versions do. Rotate to landscape for easier typing and viewing.

Why won't my TI-84 graph?

Check Y= for the function, turn the plot ON, then try ZOOM → ZStandard.

How do I load programs or games?

On physical devices, use TI Connect CE. In the browser, follow the tool's import instructions (if supported).

How do I clear memory without losing everything?

Back up lists/programs first. Use reset options carefully; only clear what you must.

Common Errors & Troubleshooting

ERR: DOMAIN, SYNTAX, WINDOW, INVALID DIM — quick fixes

• DOMAIN: Inputs outside allowed range (e.g., even root of a negative). Recheck math mode and inputs.
• SYNTAX: A typo or missing parenthesis. Re-enter carefully.
• WINDOW: Graph is off-screen. Use ZOOM → ZStandard.
• INVALID DIM: Mismatched list lengths or matrix sizes. Align sizes and retry.

When to Reset, RAM Clear, or Update OS

If keys lag or lists behave oddly, consider a RAM clear (knowing it resets settings). Physical devices may benefit from an OS update via TI Connect CE; confirm compatibility first.

TI-84 Calculator for Exams (SAT, ACT, AP, IB)

Many exams allow TI-84-class devices, but always check official policies in your region, school, or test center. Practice with timed sets and consider the Pomodoro Technique to improve focus and pacing.