Does the Peruvian DNI have a check digit?

The 8-digit DNI itself has no official check digit, so only its format can be validated. The verification digit shown is the RENIEC-style modulo-11 figure (weights 3,2,7,6,5,4,3,2) that banks and services append.

How accurate is this validator?

The 8-digit format check is exact and the verification-digit formula is deterministic. A valid format does not prove the DNI is registered with RENIEC, which this tool never contacts.

How is the verification digit calculated?

Each of the 8 digits is multiplied by the fixed weights 3, 2, 7, 6, 5, 4, 3, 2, the products are summed, and the result is 11 − (sum mod 11). A result of 10 becomes 0 and a result of 11 becomes 1.

What is a DNI in Peru?

The DNI (Documento Nacional de Identidad) is the national identity document issued by RENIEC to every Peruvian citizen. Its 8-digit number identifies the holder across government and financial services.

Why do banks ask for a verification digit?

Banks and online services append a check digit to the 8-digit DNI to catch typing errors. This tool computes that digit so you can confirm a number was entered correctly.

Does a valid format mean the DNI is real?

No. A correct format and matching verification digit only mean the number is well-formed. Confirming that a DNI actually exists requires a RENIEC lookup, which this offline tool never performs.

Is my DNI sent anywhere?

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

Peru DNI Validator — Gera Tools

Peru DNI validator

Validate a Peruvian DNI (Documento Nacional de Identidad), the national ID issued by RENIEC. The DNI is an 8-digit serial number; this tool confirms the format and computes the RENIEC-style modulo-11 verification digit that banks and online services often require alongside it. You can also enter a digit to check whether it matches.

How it works

The verification digit comes from a weighted modulo-11 checksum of the 8 digits:

weights = 3, 2, 7, 6, 5, 4, 3, 2   (applied left to right)
sum     = Σ (digit × weight)
r       = 11 − (sum mod 11)
digit   = 0 if r = 10, 1 if r = 11, otherwise r

The 8-digit format check is exact. The DNI itself carries no official check digit, so this is a format and verification-digit tool, never a registry lookup.

Example

For DNI 10203040:

Products: 1×3 + 0×2 + 2×7 + 0×6 + 3×5 + 0×4 + 4×3 + 0×2 = 3 + 14 + 15 + 12 = 44
44 mod 11 = 0 → r = 11 − 0 = 11 → verification digit = 1

So this DNI would be written 10203040-1 where a check digit is required.

Step	Value
Weighted sum	44
sum mod 11	0
11 − remainder	11
Verification digit	1

It is privacy-first: nothing leaves your browser. The validator checks format and computes the verification digit only — it never confirms the DNI against any registry.