Quadratic Equation Solver: Roots, Discriminant and Vertex

Solve any quadratic equation with the quadratic formula: real or complex roots, the discriminant and the vertex of the parabola.

How to use the quadratic equation solver

1. Type your numbers in the boxes (pick your currency or units if asked).
2. The answer updates as you type: no button to press.
3. Copy the result, or share it on WhatsApp with one tap.

Questions

What is the quadratic formula?

x = (−b ± √(b² − 4ac)) ÷ 2a.

Is my data private?

Yes. Everything happens inside your own browser: nothing you type or choose is uploaded to us or anyone else.

Is it free?

Completely free, with no sign-up, no watermark and no limit on how many times you use it. Light ads keep the site running.