Matrix Calculator — Add, Multiply & Invert
Add, subtract and multiply 2x2 and 3x3 matrices
How to Use Matrix Calculator
Add, subtract and multiply 2x2 and 3x3 matrices No signup, and nothing gets uploaded for most use.
- 1
Enter your numbers in the input fields.
- 2
Choose the calculation options or frequency.
- 3
The result updates instantly as you type.
- 4
Review the breakdown, chart, or schedule, and copy the answer.
Why you might like it
- Nothing to upload — the work happens on your device.
- Free with no signup, no watermarks, and no daily limits.
- Works in any modern browser on any device — nothing to install.
- Usually done in a few seconds, so it doesn't get in your way.
Frequently Asked Questions
Can I multiply a 2×2 matrix by a 3×3 matrix?▾
No. Two matrices can be multiplied only when the number of columns of the first equals the number of rows of the second. This calculator multiplies same-sized square matrices.
What does det(A) mean?▾
The determinant is a scalar that summarizes a square matrix. It is zero for singular (non-invertible) matrices, and for 2×2 matrices [[a, b], [c, d]] it equals ad − bc.
Related Tools
Percentage Calculator
Calculate percentages, percent change and ratios
Quadratic Equation Solver
Solve quadratic equations with roots and parabola
Scientific Calculator
Full-featured scientific calculator with trigonometry and logs
Cube Root Calculator
Calculate cube roots of any number
Determinant Calculator
Compute determinants and inverses of small matrices
Factorial Calculator
Calculate n! with trailing zeros and digit count
Fraction Calculator
Add, subtract, multiply and divide fractions
GCD Calculator
Find the greatest common divisor with full steps
Learn more
Quadratic: The Complete Guide for 2026
Learn how the Equation Solver works — the quadratic formula, real roots, vertex and axis, and the parabola chart.
How to Use Quadratic: A Step-by-Step Guide
Step-by-step guide to using the Equation Solver — enter coefficients a, b, and c, then read roots, vertex, and the parabola chart.
Quadratic: Formats, File Types, and Size Limits
An overview of the Equation Solver's inputs — the coefficients a, b, and c — and the results it returns.