## Barcode Check Digit Calculator

Calculate GTIN (EAN/UPC) check digit by entering all the numbers that appear under the barcode.

Barcode number 4813642136976 has an incorrect check digit.

Corrected Barcode number is 4813642136978.

Corrected Barcode number is 4813642136978.

### Check Digit Calculation

Position: | 1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|

Digits: | 4 | 8 | 1 | 3 | 6 | 4 | 2 | 1 | 3 | 6 | 9 | 7 | 6 |

Mutiply digits by: | 1 | 3 | 1 | 3 | 1 | 3 | 1 | 3 | 1 | 3 | 1 | 3 | |

= | 4 | 24 | 1 | 9 | 6 | 12 | 2 | 3 | 3 | 18 | 9 | 21 | |

Calculate total sum: |
112 | ||||||||||||

Calculate modulo 10: | Subtract the from nearest equal or higher multiple of tensum=> 120 - 112 = 8 (check digit) |
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Correct Number: | 4 | 8 | 1 | 3 | 6 | 4 | 2 | 1 | 3 | 6 | 9 | 7 | 8 |

### Remarks:

- Check digit is the right most digit in the barcode number.
- Multipliers of 3,1,3,1 ... are always applied from the right to the left of the symbol. This way both EAN-13 and UPC-A will have same check digit (since UPC-A carries same data with one additional 0 on the left).