Inverse, cofactors and adjoint 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.

How to use the calculator
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 enter.



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 , ,
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