TI-84 Calculator
A free online TI-84 style scientific calculator. Evaluate any expression — trig, logs, roots, exponents, and parentheses — instantly.
Click buttons or use your keyboard. Press Enter to evaluate, Backspace to delete, Esc to clear.
Or use the standard form below
What is TI-84 Calculator?
The TI-84 Calculator is the most widely used graphing calculator in U.S. high schools and intro-college classes — required on the SAT, ACT, AP Calculus, and AP Statistics. This online TI-84 style calculator evaluates any scientific expression in your browser, no download needed.
Enter expressions exactly as you would key them on a real TI-84: sin(30) + sqrt(16) + 2^3, log(1000), ln(e), exp(1), and so on. Switch between degrees and radians like the MODE menu on a real device.
Functions and constants
Supported functions and constants:
- Arithmetic: + − × ÷ ^ ( )
- Roots:
sqrt(x),cbrt(x) - Powers and logs:
exp(x),log(x)(base 10),ln(x)(base e) - Trig (DEG or RAD):
sin,cos,tanand inversesasin,acos,atan - Hyperbolic:
sinh,cosh,tanh - Other:
abs,floor,ceil,round,fact(n) - Constants:
pi,e
Worked example
Expression: sin(30) + sqrt(16) + 2^3 in DEG mode.
- sin(30°) = 0.5
- √16 = 4
- 2³ = 8
- Total = 12.5
Expression: log(1000) + ln(e) → 3 + 1 = 4.
How to use this calculator
- Type your expression — use
^for powers,*or×for multiplication. - Pick degrees or radians (matches the MODE menu on the real TI-84).
- Set how many decimal places to display.
- The result updates as you type.
Use parentheses generously: sin(30 + 15) ≠ sin(30) + 15. Same as the real device.
Frequently asked questions
Is this a real TI-84 emulator?
No — running the actual TI-84 ROM in a browser would require Texas Instruments' copyrighted firmware. This is a free TI-84 style scientific calculator that handles the same expressions and functions students use every day.
Why does sin(30) give 0.5 here but a different number on my own calculator?
Angle mode. On a TI-84, MODE switches between Degree and Radian. Set this calculator to DEG and sin(30) = 0.5 (since 30° is π/6). Set it to RAD and sin(30) treats 30 as radians, returning −0.988.
Can I use it on the SAT or ACT?
No — the SAT and ACT only allow approved physical calculators. Use this for homework, practice tests at home, and quick checks. Buy or borrow a real TI-84 (or comparable) for the test itself.
What's the difference between log and ln?
log(x) is base 10 (common log). ln(x) is base e ≈ 2.71828 (natural log). On a TI-84 the LOG and LN buttons match this convention exactly.
Why does my expression say "Unknown name"?
The calculator only recognizes the function names listed above. Common pitfalls: typing SIN uppercase (use sin), forgetting the parentheses around the argument, or using x as a variable (this evaluator takes only numeric expressions).