Math calculators
Algebra Calculators
10 tools
Quadratic formula, linear ax + b = rhs, polynomial roots, small linear systems, and matrix det / inverse / rank / LU / QR / eigen.
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- Linear Equation Calculator Solve ax + b = rhs for x. Identity and inconsistent cases when a = 0. Not the quadratic formula. Runs locally.
- Linear System Calculator Solve small linear systems Ax = b, plus det, inverse, rank, LU, QR, and eigenvalues. Same engine as the matrix workspace. Not a CAS. Runs locally.
- LU Factorization Calculator Doolittle LU factorization with partial pivoting for a small real matrix. Same engine as Linear System. Not a CAS. Runs locally.
- Matrix Determinant Calculator Determinant of a small real matrix. Same engine as Linear System and the matrix workspace. Not a CAS. Runs locally.
- Matrix Eigenvalues Calculator Eigenvalues and eigenvectors of a small real matrix via the characteristic polynomial. Same engine as Linear System. Not a CAS. Runs locally.
- Matrix Inverse Calculator Inverse of a small real matrix via Gauss–Jordan. Same engine as Linear System. Singular matrices fail. Not a CAS. Runs locally.
- Matrix Rank Calculator Rank of a small real matrix via Gaussian elimination. Same engine as Linear System. Not a CAS. Runs locally.
- Polynomial Roots Calculator Find all roots of a real polynomial of degree 1–8. Closed form for linear and quadratic; Durand–Kerner for cubics and higher. Not the quadratic formula page. Runs locally.
- QR Factorization Calculator Householder QR factorization of a small real matrix. Same engine as Linear System. Not a CAS. Runs locally.
- Quadratic Formula Calculator Solve ax² + bx + c = 0 with the quadratic formula. Free online tool — no sign-up. Clear formulas and worked examples. Runs locally in your browser.