Interactive calculators that run in your browser. No account required.
Plot several functions y = f(x) in 2D, or a surface z = f(x, y) in 3D.
Symbolic 1st, 2nd or 3rd derivatives, with a tangent line you can slide along the curve.
Numeric definite integrals, symbolic antiderivatives where possible, and Riemann-sum rectangles.
Plot and drag complex numbers on the Argand plane, combine them, draw n-th roots and powers, and colour the plane by f(z).