A 1 B 2 C3d4e5f6g7h8i9j10k11l12m13 2025 Update. Convert letters to numbers in various formats. This version (7) is based on the august 1, 2025 snapshot from scopus, updated to end of citation year 2023.

Converts alphabet characters into their corresponding alphabet order number (e.g. Convert letters to numbers in various formats.