TI 84 Plus Calculator That Runs in Your Browser

Left your TI-84 in your locker, or never owned one in the first place? TICALC84 is a free TI-84 Plus graphing calculator that runs entirely in your browser: same button layout, same menus, same math, nothing to download, and nothing to buy.

It’s built to mirror the TI-84 Plus and TI-84 Plus CE, the calculators most U.S. classrooms actually use for algebra, statistics, and calculus, and the models the College Board recognizes for the SAT, ACT, and AP exams. Open it on a laptop, Chromebook, tablet, or phone, and the keypad and menus behave the way the physical device does. If you already know where MATH, STAT, or Y= is on a real TI-84, you already know your way around this one. (Some people call this kind of tool a TI-84 simulator or emulator; same idea, browser-based instead of installed.)

Found a bug or missing something you need? support@ticalc84.com goes to a real person.

What You Can Actually Calculate

This isn’t a stripped-down version. It covers the same range a physical TI-84 Plus does:

• Graphing: plot several functions at once (Y1, Y2, Y3…), adjust the window and zoom, trace along a curve to read coordinates
• Statistics: one- and two-variable stats, standard deviation, linear regression, Z-tests, and confidence intervals
• Core math: cube roots and other radicals, fractions, absolute value, matrix operations
• Programming: write and run TI- Basic programs, with Python support for the kind of coding tasks the newer CE models handle
• Storage: archive memory so saved programs and data carry over between sessions

TI-84, TI-84 Plus, or TI-84 Plus CE: Does It Matter Which One You’re Used To?

Texas Instruments has shipped a few versions of this calculator over the years, and they’re not identical:

Types	TI-84 Plus	TI-84 Plus CE
Display	Monochrome	Full color, backlit
Memory	480KB Flash ROM, 24KB RAM	Roughly 3MB storage, faster processor
Programming	TI-Basic	TI-Basic + Python
Power	AAA batteries	Rechargeable

TICALC84 follows the Plus/CE menu layout, so whichever version your class uses, the keystrokes line up.

See It Work: Three Quick Examples

Finding a cube root. Press MATH, scroll to option 4 (∛()), type the number, say, 27, close the parenthesis, and hit ENTER. ∛(27) returns 3.

Graphing a function and reading its roots. Press Y=, type a function next to Y₁, for example, X²−4, and then press GRAPH. Use ZOOM → 6 (ZStandard) if the curve doesn’t fit the window. For Y1 = X²−4, the graph crosses the x-axis at −2 and 2; TRACE lets you confirm it point by point.

Standard deviation from a data set. Press STAT → 1 (Edit) and type your values into L1. Press STAT again, arrow to CALC, choose 1 (1-Var Stats), and press ENTER. The output gives you both Sx (sample standard deviation) and σx (population standard deviation) alongside the mean.

Who’s Actually Using This

A high school sophomore graphing a parabola for the first time needs something different from a stats grad student running a regression at midnight—TICALC84 covers both ends. Teachers use it to project worked examples on a screen without passing a physical calculator around the room. Parents helping with homework get the same buttons their kid sees in class, instead of guessing at a generic app’s layout. And it holds up for the occasional professional, an engineer or analyst who needs a quick calculation and doesn’t want to dig a physical calculator out of a drawer.

Getting Started

1. Open TICALC84 in your browser — no sign-up, no install.
2. Pick what you need: the Y= editor for graphing, STAT for data and statistics, and MATH for everything else.
3. Enter your numbers or equations and press ENTER for your result.

Frequently Asked Questions