Discriminant Calculator

Enter quadratic coefficients to find the discriminant and root classification.

Δ = -4Two complex roots

How to use this Discriminant Calculator

Calculate b² − 4ac and determine the number and type of quadratic roots. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.