Swedish Personal Number Validator

How Swedish Personal Number Validator Works?

The Swedish Personal Number Validator applies Luhn to the 9 digits YYMMDDNNN. It compares that result with digit 10 of the personnummer.

1. 1Convert the 12-digit form (YYYYMMDD-NNNC) to 10 digits by dropping the century.
2. 2Multiply the first 9 digits by 2, 1, 2, 1, 2, 1, 2, 1, 2.
3. 3Add the digits of each product.
4. 4Compute (10 − (S mod 10)) mod 10.
5. 5Compare the result with the last digit.

Swedish Personal Number Validator Formula

The personnummer formula is C = (10 − (Σ digitsum(dᵢ·wᵢ) mod 10)) mod 10, with wᵢ = 2, 1, 2… from the left.

S = Σ digitsum(dᵢ × wᵢ),  w = 2,1,2,1,2,1,2,1,2
C = (10 − (S mod 10)) mod 10   (SWEDISH PERSONAL NUMBER VALIDATOR)

• NNN is the birth number; the 3rd digit is odd for men and even for women.

Luhn sum = 44
Check = 6
Personnummer = 811218-9876

Swedish Personal Number Validator Conversion Table

The personnummer conversion table lists sample birth dates and birth numbers with their check digit.

Samordningsnummer (co-ordination numbers) add 60 to the day and use the same check digit rule.

What is Swedish Personal Number Validator?

A Swedish Personal Number Validator is a tool that verifies the Luhn check digit of a Swedish personnummer issued by the Swedish Tax Agency (Skatteverket).

People aged 100 or more use + instead of - as the separator in the 10-digit form.

What are the uses of Swedish Personal Number Validator?

There are 3 main uses of the Swedish Personal Number Validator, including BankID sign-up, healthcare records, and payroll.

• BankID and sign-up flows: Swedish services validate the number before identity checks.
• Healthcare records: Regions check personnummer in patient systems.
• Payroll: Employers validate employee numbers for tax reporting.