Find the determinant of a square matrix and see the working. Cofactor expansion for small matrices, row reduction for larger ones. Exact fractions, no rounding. Dimensions up to 6×6.
Enter the entries of a square matrix — whole numbers, decimals, and fractions like 1/2 are all accepted.
Pick a size from 1×1 to 6×6. Determinants are only defined for square matrices, so rows and columns always match.
Type a value into each cell. The result updates as you type, and every value is kept as an exact fraction rather than a rounded decimal.
The determinant appears first. Matrices up to 3×3 show the cofactor expansion term by term; 4×4 and larger show the row-reduction elimination steps.