Real 2×2 matrices; eigenvectors and larger matrices are excluded.
Eigenvalue Calculator
Enter your values below to get the result first, then scroll for the full explanation and guidance.
Eigenvalues
3, 1Real 2 x 2 matrix
Eigenvalues: 3, 1 (Real 2 x 2 matrix)
The eigenvalues are the roots of lambda squared minus the trace times lambda plus the determinant.
Characteristic polynomial
The eigenvalues are the roots of lambda squared minus the trace times lambda plus the determinant.
Result snapshot
A quick visual read of the values behind this result.
Trace4
Determinant3
Recommended next checks
- →This bounded mode returns eigenvalues only, not eigenvectors or larger matrices.
- Trace
- 4
- Determinant
- 3
Try different values to compare results.
Calculate the real or complex eigenvalues of a real 2×2 matrix.
Eigenvalues
3, 1Real 2 x 2 matrix
Eigenvalues: 3, 1 (Real 2 x 2 matrix)
The eigenvalues are the roots of lambda squared minus the trace times lambda plus the determinant.
Characteristic polynomial
The eigenvalues are the roots of lambda squared minus the trace times lambda plus the determinant.
Result snapshot
A quick visual read of the values behind this result.
Trace4
Determinant3
Recommended next checks
- →This bounded mode returns eigenvalues only, not eigenvectors or larger matrices.
- Trace
- 4
- Determinant
- 3
Try different values to compare results.
Table of Contents
Table of Contents
About Eigenvalue Calculator
Eigenvalue Calculator helps you work through the main numbers for this topic quickly with a simple input flow and an instant result.
Use the calculator result as a practical starting point, then review the explanation and assumptions on the page if you want more context.
Calculation method
Solve lambda² - trace(A)lambda + det(A) = 0.
Formula explained
Calculation flow
This calculator is structured for fast UK-focused estimates with clear inputs, repeatable logic, and instant results.
Formula
Input values -> calculation engine -> instant result
How the result is built
1Enter the values requested in the form.
2The calculator applies the configured formula logic.
3The result updates instantly with a breakdown.
4Use the output to compare scenarios quickly.
Example
Example verified by the calculator's linear algebra reference cases.
Assumptions
- Real 2×2 matrices; eigenvectors and larger matrices are excluded.
Source basis
- UK-focused calculator flow
- Structured input validation
- Instant result breakdowns
FAQ
Common questions
Trust and notes
Assumptions and important notes
This calculator is designed to give a fast estimate using the method shown on the page. Results are most useful when your inputs are accurate and the tool matches your situation.
Use the result as guidance rather than a final diagnosis or professional decision. If the result could affect health, legal, financial, or compliance decisions, verify it with a qualified source where appropriate.
- Real 2×2 matrices; eigenvectors and larger matrices are excluded.
Method
UK calculator guidance
Last reviewed
April 17, 2026