Quadratic Formula Calculator
Solve a quadratic equation ax² + bx + c = 0.
Result
Results are estimates for general information only and are not professional advice.
Solving quadratics
The quadratic formula, x = (−b ± √(b² − 4ac)) ÷ 2a, solves any equation of the form ax² + bx + c = 0. This calculator returns the roots, whether they are real or complex, along with the discriminant.
Frequently Asked Questions
What is the Quadratic Formula Calculator?
Solve a quadratic equation ax² + bx + c = 0. It runs instantly in your browser and is completely free to use.
What do I need to enter to use the Quadratic Formula Calculator?
The Quadratic Formula Calculator asks for the following values (3): a, b, c. Fill them in and the result appears immediately — the calculation runs on your own device, so nothing you type is sent to a server.
How accurate is the Quadratic Formula Calculator?
The Quadratic Formula Calculator uses standard, widely-accepted formulas, so its figures are reliable estimates for everyday planning. They are not a substitute for advice from a qualified professional.
Is the Quadratic Formula Calculator free, and do I need an account?
Yes. The Quadratic Formula Calculator — and every other calculator on Calculatis — is completely free, with no registration, no download and no limit on how often you use it.