Spreadsheet Column Letter Converter
Convert between spreadsheet column letters (A, B, ..., AA) and numbers.
Runs in your browserAbout this tool
Spreadsheet formulas and programming references to spreadsheet cells use column letters (A, B, ..., AA, AB), while working with the same columns programmatically usually means working with plain numbers — and converting between the two by hand gets error-prone past column Z. This tool converts between spreadsheet column letters and their numeric equivalents in either direction, useful when writing formulas, scripts or documentation that needs to reference spreadsheet columns precisely.