Free Online TI-84 Calculator
Full-featured TI-84 Plus CE calculator simulator in your browser
Try the calculator →Free TI-BASIC Program Editor & Calculator Programs
Write, debug, and run TI-BASIC programs in your browser. Load ready-made quadratic solver, factorial, and geometry templates — test them live, then copy the source code to your TI-84 Plus CE. No download, no account needed.
Write and Run TI-BASIC Programs Without a Physical Calculator
This is a free browser-based TI-BASIC editor that lets you write, test, and run calculator programs without a physical TI-84. Every TI-84 student eventually wants a program they do not have to type from scratch. Quadratic formula solver? Factorial calculator? Distance formula? This TI-BASIC program editor gives you the source code ready to edit, test in the browser, and transfer to your physical calculator. The built-in interpreter runs your code line by line, so you can verify output before ever touching a USB cable.
Start With a Template: Your First TI-BASIC Program in Two Minutes
Never written a calculator program before? Here is the fastest way to start — it takes about two minutes:
- Pick a template. Click the Quadratic Solver template (or start from scratch with "+ New Program"). Templates give you working code immediately.
- Read the comments. Every line of template code has a comment explaining what it does. Comments start with a double quote (
") in TI-BASIC. Read through them to understand the program logic. - Run it in the browser. Click "Run" to execute the program in the built-in interpreter. For the quadratic solver, it will prompt you for A, B, and C — type numbers and see the roots appear in the output console.
- Make a change. Try modifying something small — change the prompt message, add a new calculation, or adjust the output format. Run again. See your change take effect instantly.
- Export to your calculator. Click "Export" to download a .txt file. Open TI Connect CE (free from education.ti.com), paste the code into a new program, and send it to your TI-84 via USB. Done.
Essential TI-BASIC Commands, Explained With Examples
If you are learning TI-BASIC for the first time, here are the most important commands you will use in every program:
| Command | What it does | Example |
|---|---|---|
Disp | Display text or a value on the screen | Disp "HELLO" or Disp X |
Prompt | Ask the user to enter a value for a variable | Prompt A,B,C |
Input | Ask the user for input with a custom message | Input "X=",X |
If/Then/Else/End | Make decisions — run code only if a condition is true | If X>0:Then:Disp "POS":End |
For/End | Loop a fixed number of times | For(I,1,10):Disp I:End |
While/End | Loop while a condition is true | While X<100:X+1→X:End |
Lbl/Goto | Jump to a labeled section of code | Lbl A: ... :Goto A |
→ (Store) | Store a value into a variable | 5→X (stores 5 in X) |
The quadratic solver template produces the same roots as the TI-84 Plus CE's PlySmlt2 application. Every template includes inline comments explaining what each command does. For a deeper walkthrough of the calculator keypad, see our TI-84 graphing calculator guide.
Editor Features: Templates, Live Interpreter, and One-Click Export
- Ready-to-run templates — quadratic solver, factorial, circle area, distance formula, and more
- Live browser interpreter — execute TI-BASIC code and see output instantly without hardware
- Syntax-aware editing — line numbers, auto-save, and command palette for fast coding
- One-click export — download your program as a .txt file ready for TI Connect CE transfer
- Import existing programs — load .txt, .8xp, or .tib files and edit them in the browser
- OS 5.4+ compatibility — written in pure TI-BASIC for TI-84 Plus CE models
- Line-by-line comments — understand what each TI-BASIC command does before modifying
- No account needed — all programs are free to view, edit, run, and download
How Do I Transfer Programs to My TI-84 Calculator?
Getting code from your browser onto your calculator takes four steps:
- Export the code. Click the Export button to download the program as a .txt file. Or just copy the code from the editor with Ctrl+C.
- Open TI Connect CE. This is Texas Instruments' free software for Windows and Mac. Download it from education.ti.com. It is what connects your computer to your calculator.
- Create a new program. In TI Connect CE, click Program Editor → New. Give it a name (up to 8 characters, letters A-Z and numbers only). Paste your code.
- Send to calculator. Connect your TI-84 via USB. Click "Send to Calculator." The program appears under the PRGM button on your calculator. For OS 5.4+, the whole transfer takes under 30 seconds.
The quadratic solver is the most popular template for a reason — it solves the problem every Algebra student faces. Our TI-84 quadratic formula guide shows the manual keystroke method if you prefer not to use programs during tests.
Common use cases: Math students use templates to verify homework answers. Science students load unit-conversion programs for physics and chemistry labs. SAT and ACT test-takers pre-load approved formula programs for exam day (check your school's testing policy first). Engineering students prototype loop-based algorithms before porting to Python. These templates give you a working head start on every scenario.
TI-BASIC Editor Questions, Answered
How do I transfer programs to my TI-84 calculator?
Export the code as a .txt file or copy it from the editor. Open the free TI Connect CE software from education.ti.com, paste the code into a new program file, and send it to your calculator via USB cable. For TI-84 Plus CE models running OS 5.4+, the whole process takes under 30 seconds.
Are student-made programs allowed on the SAT and ACT?
It depends on the exam. The SAT and ACT prohibit programs with CAS (Computer Algebra System) functionality, but basic formula programs like quadratic solvers and distance formulas are generally permitted. Per the 2025-2026 College Board calculator policy, programs without CAS are allowed. Always check with your teacher or testing coordinator before exam day.
What is the best quadratic formula program for TI-84?
The quadratic solver template on this page handles real and complex roots, displays the discriminant value, and shows factored form when applicable. It is written in pure TI-BASIC (no assembly libraries needed) and works on all TI-84 Plus models including the CE. Teachers recommend it because the commented code helps students learn syntax while using it as a homework verification tool.
Can I write my own programs from scratch?
Yes. Click "+ New Program," give it a name (A-Z, up to 8 characters), and start typing TI-BASIC code. Use the command palette on the right to insert common commands like Disp, Prompt, For, If/Then, and Goto. The editor auto-saves to browser storage, so your work survives a page refresh.
Does this editor work on phones and tablets?
Yes. The editor is fully responsive and works on iOS Safari, Android Chrome, and all modern mobile browsers. The command palette buttons are sized for touch input. For the best experience on small screens, use landscape orientation for the code editor.
Can I import existing TI-BASIC programs?
Yes. Load .txt, .8xp, or .tib files into the editor to view and modify them. This is useful if you have programs from a friend, teacher, or online forum that you want to customize before transferring to your calculator. The editor preserves line numbers and syntax formatting during import.
Are the templates compatible with all TI-84 models?
Yes. Every template is written in pure TI-BASIC with no assembly libraries, so it works on TI-84 Plus, TI-84 Plus Silver Edition, and TI-84 Plus CE. The quadratic solver produces the same roots as the PlySmlt2 application.
Ready to go further? TI-BASIC Developer, the community wiki, is the best free reference for command syntax, and Texas Instruments' official 10 Minutes of Code lessons walk you through your first programs step by step. If you are still choosing a device, our TI-84 model comparison explains the differences between the Plus and CE lines.
Last updated: August 4, 2026
Miqdad Qaisrani