What this calculator does
The A1Z26 code is a simple substitution system that replaces each letter of the alphabet with its position number: A is 1, B is 2, and so on through Z as 26. It’s a common tool for basic puzzles and simple ciphers.
How the calculation works
Each selected letter is converted to uppercase, and its character code is compared to the character code of ‘A’ to find its position (position = letterCode − 64 in ASCII terms). The numbers are shown in the order the letters were selected.
This is a simple educational substitution code, not a secure form of encryption.
Last reviewed August 2026