Matrix Determinant Calculator

Compute the determinant of a square matrix of any size using LU decomposition with partial pivoting.

Enter values

Result

det(A)

Compute the determinant of a square matrix of any size using LU decomposition with partial pivoting.

Also known as: determinant calculator, det of matrix, 3x3 determinant, 2x2 determinant.

Enter matrix a (rows on new lines).
The result updates instantly as you type — press Calculate (or Enter) at any time.
Review the breakdown shown under the main result.
Use Copy result or Share to save the answer or send a link with your inputs.

det(A) = product of pivots × (−1)^swaps

Using the values pre-filled in the calculator above:

the calculator returns:

Type one row per line, separating values with spaces or commas. You can also separate rows with semicolons: 1 2; 3 4.