Matrix Calculator - Free Online Tool | PivaBox

Perform matrix operations: addition, subtraction, multiplication, determinant, inverse, transpose, and scalar multiplication

How to Use Matrix Calculator

1. Set the dimensions (rows × columns, 1-4) for Matrix A and Matrix B. Enter your values in the grid — click any cell and type a number
2. Choose an operation from the dropdown: A+B, A-B, A×B, det(A), A⁻¹ (inverse), Aᵀ (transpose), or scalar multiplication k×A
3. Click Calculate to see the result. For 3×3 determinants, a step-by-step cofactor expansion is shown. Error messages explain dimension mismatches

Frequently Asked Questions

Is this matrix calculator free?

Yes, PivaBox Matrix Calculator is completely free. All computation runs locally in your browser — no data is sent anywhere.

What matrix operations are supported?

Addition, subtraction, multiplication, determinant, inverse (A⁻¹ using Gaussian elimination), transpose, and scalar multiplication. Matrices up to 4×4 are supported.

How is the inverse computed?

The inverse is computed using Gauss-Jordan elimination with an augmented matrix [A|I]. If the determinant is zero (singular matrix), an error is shown since the inverse does not exist.