 # Matrix Calculator Online | Complex Matrix & Linear System Solver

The most advanced Real/Complex Matrix Calculator and Simultaneous Linear Equation Solver with the most sophisticated matrix interface, efficient and fun to use too!

Use this online Matrix Calculator to perform matrix algebra, calculate matrix expressions including complex matrices. You can use this Matrix Calculator to solve simultaneous systems of linear equations too. Add, subtract, multiply and even divide (multiply by inverse of) compatible matrices. Use this Matrix Calculator to easily calculate the determinant, inverse and adjugate of square matrices and find the rank of a matrix. Also transform matrices to lower triangular, upper triangular and reduced row echelon forms.

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Note: One interface for all matrices including augmented matrices representing systems of linear equations! The matrix calculator remembers the dimensions and entries of all matrices and whether a matrix is augmented or not. Just select a named matrix from the drop-down list and set its dimensions and fill the matrix with real or complex numbers. You can increase the dimensions of a selected matrix by adding rows or columns to it by pressing the + (insert row or insert column) buttons provided. You can also set the dimensions of a selected matrix by entering the number of its rows or columns in the text boxes provided or, conveniently, by pressing the numbered buttons on the left of a row or above a column, respectively.

This elegant matrix calculator deploys one single interface which can be used to enter multiple matrices including augmented matrices representing systems of linear equations!

In addition to adding, multiplying matrices, you can use this matrix calculator to calculate determinant, inverse and adjugate of square matrices and find the rank of any matrix. Also transform matrices to lower triangular, upper triangular and reduced row echelon forms.

You can also solve systems of linear equations. The linear equation solver can solve any m × n linear equations.

Matrices can have real, imaginary and, in general, complex numbers as their elements. This complex matrix calculator can perform matrix algebra, all the previously mentioned matrix operations and solving linear systems with complex matrices too.

Furthermore, this matrix calculator evaluates matrix expressions containing up to eight real or complex matrices and shows work.

## How to Use The Online Matrix Calculator

The matrix calculator allows you to do matrix algebra (matrix addition, matrix multiplication, matrix inverses, etc.) with Real or Complex Matrices and solve systems of linear equations simultaneously.

### Matrix Algebra

Press the relevant buttons at the top of the Matrix Calculator to calculate the determinant, inverse, reduced row echelon form, adjugate, lower/upper triangular forms and transpose of the real or complex matrix A (initially selected).

You can do similarly as above with other matrices by first selecting them from the drop-down list on right side of the Matrix Calculator.

The matrices (A, B, C, ..., H ) are initially filled with 0's.

You can set the numbers of rows and columns of a selected matrix by pressing the buttons on the left or above the selected matrix, respectively. You can also add rows or columns by pressing the relevant + button.

This Online Matrix Calculator allows you to use any numeric (constant) expression, e.g., 1/2+3i2sin(3pi/2) for a matrix element.

Under the Quick Calculations menu you can calculate frequently used matrix expressions involving two or more matrices.

If a matrix expression is not listed under the quick calculation menu, you can enter it in the expression box provided and press the Calculate button.

This Matrix Calculator allows you to use any matrix expression which can be in the most general form, such as (2+sin(π/3))A + inv(A+B/det(A))(B/2 + BC^4)/D^(3+2^5)

If the matrix expression is a valid expression and contains no operations of incompatible matrices, the result will be displayed. Otherwise an error message is displayed.

All 1x1 matrices are treated as scalars by this Online Matrix Calculator. They can be multiplied by any matrix (on either side) regardless of its dimension. Also if, for example, A = [1/2], then sin(A) is treated as sin(1/2). Conversely, whenever appropriate, scalars are treated as 1x1 matrices. For example, inv(2) is treated as inv() which will be given as 0.5.

You can also use this Online Matrix Calculator as a multi-variable function evaluator. Type in a function expression containing up to 8 variables (use A, B, C, ... as variables, instead of x,y,z, ...). Set all matrices involved as 1x1 matrices. Assign numbers (or constant expressions) to the variables (i.e., 1x1 matrices) and press the Calculate button. The value of the function is given as a scalar.

You can use the following in your expressions: inv(), adj(), trans(), rref(), ut(), lt(), det()

1/A is the same as inv(A) and A/B is the same as A*inv(B)

### Solving Linear Systems

The system of linear equations solver allows two different ways to solve simultaneous system of linear equations.

With the first method, which is a neat way to solve a single linear system, select the Linear System checkbox provided. Set the dimensions of the coefficient matrix and fill the augmented matrix with real or complex numbers (or expressions of them) noting the last column highlights the rhs (right hand side) of the system. Now press the Solve button. If the system is consistent and has a unique solution, the vector representing the unique solution will be displayed together with the RREF (reduced row echelon form) of the augmented matrix. If there are more than one solutions, the general solution is given. If the system is inconsistent a message stating so and the RREF will be displayed.

With the second method you can solve more than one linear system at once, all having the same square matrix m × m as their coefficient matrix. Do not select Linear System but set the number of columns more than the number of rows. Fill each column after the mth column with the right hand side of the corresponding system (with the same coefficient matrix) and press the RREF button. If you see the entries of the m × m matrix on the left of the reduced row echelon form, then each system has a unique solution with the corresponding solution vector appearing on the right hand side.