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Quadratic Equation Solver

Solve ax² + bx + c = 0. Free online calculator with instant results — no login needed.

a b c

Root 2

Discriminant

Root 1

What is the Quadratic Equation Solver?

Solve ax² + bx + c = 0. Free online calculator with instant results — no login needed.

Enter your values above and the result updates instantly. If the discriminant is negative, roots are complex.

x = (−b ± √(b²−4ac)) ÷ 2a

Discriminant

Root 1

Root 2

What is the discriminant?

b²−4ac; it tells the number of real roots.