Function Calculator
Enter any function f(x) and evaluate it at a point, create a value table, and plot it. Supports sin, cos, tan, log, exp, roots, powers, and composite functions. Ideal for algebra, precalculus, and calculus.
Full original guide (expanded)
Function Calculator
Enter a function f(x) to evaluate a point, build a value table, and plot an interval. Supports standard notation including sin(x), ln(x), sqrt(x), e^x, and powers like x^2.
Examples: x^2, sin(x), (x^2 + 3)/(x-1), exp(0.5*x), log(x,10). Use pi and e.
Graph
If the function is defined on the chosen interval, it will be sampled and drawn below.
Supported function syntax
This function calculator uses a math engine (math.js) that supports:
- Arithmetic:
+,-,*,/,^ - Constants:
pi,e - Trigonometry:
sin,cos,tan,asin,acos,atan - Exponentials & logs:
exp,ln,log10,log(a,b) - Roots:
sqrt(x),nthRoot(x, n) - Piecewise via
conditional ? trueExpr : falseExprstructure (basic)
If the function is undefined at some x (for example, division by zero), those points are skipped in the table and chart.
FAQs
How is this different from a simple calculator?
A normal calculator evaluates single expressions. A function calculator treats your input as f(x), so you can evaluate it at many x values, graph it, and see the derivative.
Can I plot discontinuous functions?
Yes, but points where the function is undefined will simply be missing from the chart, resulting in gaps.
Can I find inverse functions?
This tool focuses on evaluation, tables and plotting. For complex symbolic operations like inverses for arbitrary functions, you typically need a CAS (computer algebra system) such as Symbolab or WolframAlpha.
Formula (LaTeX) + variables + units
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- T = property tax (annual or monthly depending on input) (currency)
- NIST — Weights and measures — nist.gov · Accessed 2026-01-19
https://www.nist.gov/pml/weights-and-measures - FTC — Consumer advice — consumer.ftc.gov · Accessed 2026-01-19
https://consumer.ftc.gov/
Last code update: 2026-01-19
- Initial audit spec draft generated from HTML extraction (review required).
- Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
- Confirm sources are authoritative and relevant to the calculator methodology.