Use a free TI-84 calculator online — scientific functions, trig, log, powers, factorials and more. No download, works on mobile, looks like a real TI-84 Plus CE.
Tip: use your keyboard too — numbers, + − * / ^ and Enter.
This TI-84 Calculator Online is a faithful browser recreation of the iconic TI-84 Plus CE graphing calculator used in high school and college math, science, and standardized test preparation worldwide. It supports all core scientific functions — sin, cos, tan (and their inverses with 2nd), log (base 10), ln, sqrt, powers via ^, x², x⁻¹, e^x, 10^x, and factorials via ! — in both DEG and RAD mode.
The on-screen layout mirrors the real TI-84 keypad: row 1 is the graphing/function row (y=, window, zoom, trace, graph), row 2 has 2nd and mode, and the main calculation keys follow below in the standard arrangement. Pressing 2nd activates secondary functions shown in blue on the key tops — for example, 2nd + sin gives asin(, 2nd + log gives 10^(, and 2nd + ^ inserts π.
Your keyboard works too: type numbers and operators directly, use Enter or = to evaluate, Backspace to delete, and Escape to clear. The last result is stored as ans and can be recalled by pressing 2nd + (−) or typing ans.
For plotting functions visually, try our full Graphing Calculator Online. For GPA calculations, see the GPA Predictor, and plan your exam prep with the Study Time Calculator and Exam Countdown Timer.
It supports all standard scientific operations: +, −, ×, ÷, powers (^), x², x⁻¹, square root, sin, cos, tan (and inverses via 2nd), log (base 10), ln, e^x, 10^x, factorials (!), π, e, and the last answer (ans).
Press the blue '2nd' button to activate secondary mode (the badge at the top will show 'ON'). Then press the key whose blue top label you want — for example, 2nd + sin gives asin(, 2nd + ^ inserts π, and 2nd + log gives 10^(.
Press the 'mode' key or click the DEG/RAD badge in the top-right of the screen. The screen header updates to show the current angle mode.
Yes — type numbers, +, −, *, /, and ^ directly. Press Enter or = to evaluate. Backspace deletes the last character, and Escape clears the current expression.
Press 2nd then (−) on the calculator keypad — this inserts 'ans' into the expression, which evaluates to the last computed result.
This online tool is great for practice and learning, but most standardized tests require a physical calculator. Use our TI-84 Online for study and homework — and bring your real calculator to the exam.