Find the Adjugate Matrix
Find the adjunct matrix. Runs entirely in your browser, so your data never leaves your device.
0 chars · 0 lines
Output
The result appears here as you type.
How to use Find the Adjugate Matrix
- 1. Paste your square matrix. Enter a square matrix in the input pane, one row per line. The adjugate is only defined for square matrices, so rows and columns must match.
- 2. Set the decimal precision. Enter a value in Decimal places to control how many digits after the decimal point appear in the resulting adjugate matrix's entries.
- 3. Copy the adjugate matrix. Copy the resulting adjugate, the transpose of the cofactor matrix, into your calculation for a matrix inverse or a linear algebra write-up.
When to use Find the Adjugate Matrix
Find the Adjugate Matrix computes the classical adjoint, the transpose of a matrix's cofactor matrix, used directly in the formula for a matrix inverse. It saves the multi-step cofactor and transpose work when done by hand.
- Computing a matrix inverse manually. The inverse of a matrix equals its adjugate divided by its determinant, and computing the adjugate here handles the most tedious part of that formula before the final division.
- Checking a homework cofactor and transpose exercise. A linear algebra assignment asks you to compute the cofactor matrix and then transpose it to get the adjugate, and this verifies the final result of both steps combined.
- Studying Cramer's rule with a concrete example. A course on solving linear systems with Cramer's rule uses the adjugate matrix, and computing one for a sample matrix gives students a numeric example to follow.
- Verifying a symbolic math derivation. You derived a formula involving a matrix's adjugate by hand and want to plug in numbers to confirm the derived expression matches a direct numerical computation.
Examples
Adjugate of a 2×2 matrix
Input
1 2 3 4
Output
4 -2 -3 1
Adjugate of a 3×3 matrix
Input
1 2 3 4 5 6 7 8 10
Output
2 4 -3 2 -11 6 -3 6 -3
About the Find the Adjugate Matrix tool
Find the Adjugate Matrix is a free online tool that works entirely inside your web browser. Find the adjunct matrix. Because the processing happens on your own device, nothing you enter is uploaded, logged or stored anywhere.
This page is one of 234 Math utilities on EditSafely. Each one does a single job well, and all of them follow the same rule: your input stays on your machine.
You can shape the output with the Decimal places setting, and the result refreshes the moment you change it. 2 worked examples further down the page show exactly what the tool produces for real inputs.
Because nothing leaves your device, the tool is suitable for sensitive content such as internal documents, credentials or customer data. It also responds instantly, since every keystroke is handled on your own machine rather than by a remote API.
Frequently asked questions
Does Find the Adjugate Matrix cost anything?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Is it safe to paste sensitive or confidential data?
No data leaves your device. The whole tool is JavaScript that runs inside your browser tab, so there is no upload, no server-side processing and no log of what you did. If you disconnect from the internet after the page loads, it keeps working.
How much text can I process at once?
There is no fixed limit. Because the work happens on your own device rather than on a shared server, the practical ceiling is your machine's memory, which comfortably handles inputs far larger than typical online tools allow.
Do I need to sign up or install anything?
Nothing to install and no account needed. Open the page in any up-to-date browser, including on a phone or tablet, and the tool is ready.
How do I use the result?
The output panel has a one-click copy button, and you can keep refining the input while you work; the result updates in place as you type.