Verify a Chilean Rol Único Tributario (RUT) check digit using the official SII modulo-11 algorithm.
Format: XX.XXX.XXX-V — check digit is 0–9 or K. Dots and dashes optional.
Try these examples
Algorithm
The RUT uses the Chilean modulo-11 algorithm. Digits are multiplied right-to-left by the repeating cycle [2, 3, 4, 5, 6, 7]. Sum mod 11: if 0 → "0", if 1 → "K", otherwise 11 − remainder. Companies typically have RUT numbers above 50,000,000.
This tool validates the check digit format only. For official verification, consult the SII registry (Chile).