Cofactors, Adjoint and Inverse of a 3 by 3 Matrix

This calculator finds the matrix of cofactors, the adjoint matrix and the exact and approximate inverse matrix of a 3 by 3 given matrix.

Calculator for Cofactors, Adjoint and Inverse of a 3 by 3 Matrix

Enter the values in the cells of the top matrix.(decimal, fraction of the form a/b and whole numbers as shown in the example below, are accepted) then press "Calculate".



row 1 , ,

row 2 , ,

row 3 , ,

Decimal Places = (Change to the number of decimals desired)



Matrix of Cofactors

row 1 , ,

row 2 , ,

row 3 , ,

AdjointT Matrix (Transpose of the matrix of cofactors)

row 1 , ,

row 2 , ,

row 3 , ,

Inverse Matrix(Exact)

row 1 , ,

row 2 , ,

row 3 , ,

Inverse Matrix(Approximate)

row 1 , ,

row 2 , ,

row 3 , ,

More References and links

The Inverse of a Square Matrix
Maths Calculators and Solvers.