How is the RUT verifier digit calculated?

Take the body digits right-to-left and multiply by the cycling weights 2,3,4,5,6,7 (restarting at 2). Sum the products, then compute 11 minus the sum modulo 11. A result of 11 gives verifier 0, a result of 10 gives K, otherwise the result is the verifier digit.

How accurate is this checker?

The modulo-11 algorithm is exact, including the K case, so a wrong verifier digit is always caught. A valid verifier means the RUT is well-formed, not that it is registered with the SII or Registro Civil, which this tool never contacts.

Is my RUT sent anywhere?

No. The checker is privacy-first — all processing happens locally in your browser and the RUT never leaves your device.

Chile RUT / RUN Checker

Chile RUT / RUN checker

Verify a Chilean RUT (tax ID) or RUN (national ID). The number ends in a verifier digit (DV) computed with a modulo-11 algorithm, which can be a digit 0–9 or the letter K. This tool computes the expected verifier, compares it with the one you entered, and shows the number with dot separators.

It is privacy-first: nothing leaves your browser. The checker only verifies the modulo-11 verifier digit — it never confirms the RUT against the SII or the Registro Civil.