Matrix Inverse Calculator

Gauss–Jordan with partial pivoting. Paste from Excel/CSV or type numbers (decimals or fractions like 1/3). Works fully offline.

Quick paste

Paste rows separated by newlines. Columns: use spaces or commas. Fractions like 1/3 are OK. Tabs may not be recognized in some environments. If you use decimal commas (e.g., 1,23), separate columns with spaces.

Results
Determinant: —
cond₁: 1-norm condition number (higher = more sensitive) · cond∞: ∞-norm condition number (higher = more sensitive) · Residual: Frobenius error (lower = better)
Tips: Use Tab/Enter to move, precision is rounded to 6 decimals for display by default. Near‑singular pivots show a warning.