Math & Statistics
Matrix Determinant Calculator
Find the determinant of a 3x3 matrix using cofactor expansion.
Your inputs
Change any value to update the result instantly.
Determinant
1
Matrix is singular
0
Trace
3
Formula and working
det(A) = a(ei − fh) − b(di − fg) + c(dh − eg)
- 1
Collect the inputs
A row 1 col 1 = 1; A row 1 col 2 = 0; A row 1 col 3 = 0; A row 2 col 1 = 0; A row 2 col 2 = 1; A row 2 col 3 = 0; A row 3 col 1 = 0; A row 3 col 2 = 0; A row 3 col 3 = 1
- 2
Apply the formula
det(A) = a(ei − fh) − b(di − fg) + c(dh − eg)
- 3
Result
Determinant = 1
Frequently asked questions
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
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