CasCalc

Symbolic calculator. Exact answers, decimals and graphs in one view.

Enter compute · ↑↓ move · $2 reuses line 2
Hover or tap a curve to trace it
How to write things
x^2 - 5x + 6 = 0An equation is solved automatically x + y = 10, x - y = 4A system of equations, separated by commas y = x^2 - 4Graph a function; trace shows zeros, max/min, intersections r = 4cos(2θ)Polar graph, θ from 0 to 2π (3cos(t), 2sin(t))Parametric curve, t from 0 to 2π. Numbers alone make a point x^2 + y^2 = 16Any curve in x and y y < x/2 - 5Inequality, shaded. Dashed edge means not included a := 3Store a value; later lines use it f(x) := x*sin(x)Define a function; it is also graphed $3The result of line 3 sqrt(x), ln(x), abs(x)Roots, natural log, absolute value limit(sin(x)/x, x, 0)Limit as x approaches 0 defint(x^2, 0, 1, x)Definite integral from 0 to 1 sum(k^2, k, 1, 10)Sum for k from 1 to 10 determinant(matrix([1,2],[3,4]))Matrices: also invert, transpose

A free CAS and graphing calculator in your browser

CasCalc is a computer algebra system: instead of rounding everything to decimals, it keeps answers exact. Solve x^2 - 2 = 0 and you get x = ±√2, with the decimal value shown alongside. It is built for high school and college students working through algebra, precalculus and calculus homework, and for anyone who wants to check their work. There is nothing to install and no account to create.

What you can do with CasCalc

  • Solve equations and systems exactly, with roots marked on the graph.
  • Simplify, expand and factor polynomials and rational expressions.
  • Differentiate and integrate, including definite integrals and limits.
  • Graph functions, polar and parametric curves, implicit curves and shaded inequalities, then trace zeros, maximums, minimums and intersections.
  • Build a worksheet with stored variables and functions that later lines can reuse.

How to get started

Type an expression or equation in the first line and press Enter. Use the toolbar to choose an action such as Factor or Derivative. Each new line can refer to earlier results, so you can work through a problem step by step the way you would on paper. Open the examples list above for ready-to-try inputs.

Frequently asked questions

Is CasCalc free? Yes. It is free to use and supported by ads.

Does it show steps? CasCalc gives exact results and graphs. For worked, step-by-step explanations, read our math guides.

Is my work saved? Your worksheet is kept only in your own browser on this device. Nothing is uploaded.

Can I use it on a test? It is a study and homework tool. Exams such as the SAT, ACT and AP set their own calculator rules.