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Quadratic Solver — Free Online Calculator
Quadratic Solver solves x = (−b ± √(b²−4ac)) / 2a — solves ax² + bx + c = 0; the discriminant b²−4ac determines how many real solutions exist. Enter your known values and the calculator solves for the rest instantly. It runs entirely in your browser, so nothing you enter is uploaded to a server. Free to use, with no signup and no watermark.
How to use Quadratic Solver
- Enter your known values in the fields.
- The result updates instantly as you type.
- Copy or note down the result.
Frequently asked questions
- What formula does Quadratic Solver use?
- x = (−b ± √(b²−4ac)) / 2a — solves ax² + bx + c = 0; the discriminant b²−4ac determines how many real solutions exist.
- Can I use it on my phone?
- Yes. The layout adapts to small screens and behaves the same on mobile as on desktop.
- Is my input saved anywhere?
- No. Values stay in your browser and are gone as soon as you close the tab.
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