IMEI checksum tool

IMEI Calculator

Generate the final IMEI checksum digit from a 14-digit TAC and serial number using the Luhn algorithm.

Full IMEIEnter 14 digits to calculate
Digits 0/14Length invalidChecksum pending
TAC in database0
Checked today0
Checked this month0

Local browser history

IMEI Check History

Checked IMEI numbers will appear here after the first successful lookup.

IMEI CHECKCreate the full 15-digit number

Type the first 14 digits and the calculator adds the final checksum digit used by IMEI validation.

LUHN ALGORITHMChecksum based on alternating doubled digits

The IMEI check digit is calculated with the Luhn formula, which helps catch common typing mistakes.

DEVICE SPECUse it before a specification lookup

A valid checksum confirms the number format before you run a device report or future paid checks.