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3×3 matrix determinant
3×3 matrix determinant: formula, units and explained result. No account required. Processing stays in your browser.
det(A) = a(ei−fh) − b(di−fg) + c(dh−eg)
Enter entries row by row. Numerical calculation with limited precision.
How to use this calculator
- Identify the quantities and convert them to the units shown.
- Apply the formula first, then compare with the substitution and result.
- Check the assumptions and whether the order of magnitude makes sense.
Levels are approximate topic groupings, not a complete curriculum for every country. Numerical results are rounded and may lose precision for extreme or nearly singular inputs.
A practical example
Use these sample inputs to check the calculation before entering your own values.
- a
- 1
- b
- 0
- c
- 0
- d
- 0
- e
- 1
- f
- 0
- g
- 0
- h
- 0
- i
- 1
Result for this example
- Determinant
- 1