Reduced Row Echelon Form Calculator

Reduced Row Echelon Form Calculator simplifies matrices using Gaussian elimination, producing unique RREF solutions for linear systems and rank analysis.

Enter a matrix in row format (use semicolon ; for new rows). Example: 1,2,1; 2,4,0; -1,2,3

Example: 1,2,1; 2,4,0; -1,2,3
Equation Preview:


Result

What is Reduced Row Echelon Form Calculator?

A Reduced Row Echelon Form (RREF) Calculator is a tool designed to transform any given matrix into its reduced row echelon form using systematic row operations. The reduced row echelon form is a canonical matrix representation that uniquely solves linear systems, reveals matrix rank, and simplifies the study of linear independence. Each nonzero row has a leading 1, every leading 1 is the only nonzero entry in its column, and each leading 1 in successive rows moves to the right.

\[ A \sim R = \text{rref}(A), \]

About the Reduced Row Echelon Form Calculator

The calculator automates Gaussian and Gauss–Jordan elimination, applying row operations:

  • Swap two rows
  • Multiply a row by a nonzero scalar
  • Add a multiple of one row to another row

These steps reduce the matrix to RREF, which satisfies the following conditions:

\[ \begin{aligned} &1.\; \text{Every nonzero row has a leading 1 (pivot).}\\ &2.\; Each pivot is to the right of the pivot in the row above.\\ &3.\; Each pivot is the only nonzero entry in its column.\\ &4.\; Rows of all zeros, if any, are at the bottom. \end{aligned} \]

For example, solving a system \(Ax=b\) is simplified when the augmented matrix \([A|b]\) is reduced to RREF, directly showing variable dependencies.

How to Use this Reduced Row Echelon Form Calculator

  1. Input the coefficients of your matrix (augmented if solving linear systems).
  2. Click "Calculate" — the tool applies Gauss–Jordan elimination automatically.
  3. View step-by-step transformations, from the original matrix to its final RREF.
  4. Interpret the result to identify solutions, rank, or dependencies in the system.

Example

Consider the system:

\[ \begin{cases} x + 2y + z = 4, \\ 2x + y - z = 1, \\ -x + y + 2z = 3. \end{cases} \]

The augmented matrix is:

\[ \left[\begin{array}{ccc|c} 1 & 2 & 1 & 4 \\ 2 & 1 & -1 & 1 \\ -1 & 1 & 2 & 3 \end{array}\right] \]

After row operations, the RREF becomes:

\[ \left[\begin{array}{ccc|c} 1 & 0 & 0 & 2 \\ 0 & 1 & 0 & 1 \\ 0 & 0 & 1 & -1 \end{array}\right], \]

which corresponds to the unique solution \(x=2, y=1, z=-1\).

This Reduced Row Echelon Form Calculator provides accurate, step-by-step results, making it an essential tool for students and professionals in linear algebra.

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