Sweden Personnummer Validator
Online validation tool for Swedish Personal Identity Numbers (Personnummer and Samordningsnummer) with Luhn algorithm check.
About Sweden Personnummer
The Personnummer is the universal national identity number in Sweden, administered by the Swedish Tax Agency (Skatteverket).
It is required for medical care, banking, taxation, employment, and government interactions.
Anatomy & Structure of Swedish Personnummer
The Swedish Personnummer is formatted as YYMMDD-NNNC or YYYYMMDD-NNNC:
| Position | Field | Length | Meaning & Rule | Example |
|---|---|---|---|---|
| 1 to 6 | Date of Birth | 6 digits | Year (YY), month (MM), and day (DD). In Samordningsnummer, 60 is added to day | 900115 |
| 7 | Separator / Delimiter | 1 char | Hyphen (-) for individuals under 100; plus sign (+) for centenarians | - |
| 8 to 10 | Individual Control Sequence | 3 digits | Birth sequence. The 3rd digit is odd for males and even for females | 238 |
| 11 | Check Digit | 1 digit | Luhn Modulo 10 check digit calculated over the 9 digits | 4 |
Official Luhn Algorithm (Modulo 10)
Skatteverket official checksum calculation:
Luhn mod 10 over 6 date digits + 3 individual digits; Check = (10 - (sum mod 10)) mod 10.
- 1. Extract the 9 base digits (YYMMDD + 3 individual digits).
- 2. Multiply digits alternately by 2 and 1 from left to right.
- 3. If a multiplication result exceeds 9, add its digits together.
- 4. Sum all processed values.
- 5. The check digit is the number required to reach the next multiple of 10.