This free app is a math calculator, which is able to calculate the invertible of a matrix. The following matrices can be inverted: - 2x2 matrices - 3x3 matrices - 4x4 matrices Best math tool for school and college! If you are a student, it will helps you to learn linear algebra! Note: The inverse of a matrix A is the matrix B, with AxB=I where I is the identity matrix and the multiplication used is ordinary matrix multiplication. A matrix is a nonsingular matrix if it is an invertible matrix, and the determinant of this matrix does not equal 0.