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Instant result
The result is updated directly from the data entered.
Online Calculator
Quadratic equation calculator
Enter the coefficients a, b and c to solve a second degree equation.
Form: ax² + bx + c = 0
x₁ = 2 · x₂ = 1
Information
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Local processing
The calculations are done in your browser without sending the values to a server.
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Free
No registration, subscription, or paid API required.
Frequently asked questions
What formula does it use?
Uses the quadratic formula based on the discriminant b² - 4ac.
What if the discriminant is negative?
Shows two complex conjugate solutions.
What if a is zero?
The tool tries to solve the equation as a linear equation.
Does it support decimals?
Yes.