Phone Letter Converter - Phone Keypad Letters ⇔ Numbers
Phone Letter Converter — Letters ↔ Numbers
LETTERS → NUMBERS
Convert between phone keypad letters and dial-pad numbers.
Map text to phone digits (e.g. CALL → 2255) or decode numeric phone sequences back to possible letter combinations.
Perfect for vanity phone numbers, phonewords, and keypad cipher puzzles.
Standard ITU-T keypad mapping: 2=ABC, 3=DEF, 4=GHI, 5=JKL, 6=MNO, 7=PQRS, 8=TUV, 9=WXYZ.
All processing happens locally in your browser — no data is ever uploaded.
1
·
2
ABC
3
DEF
4
GHI
5
JKL
6
MNO
7
PQRS
8
TUV
9
WXYZ
*
·
0
SPACE
#
·
Input
Encoding:Auto-detect▾
Auto-detect
UTF-8
UTF-16 LE
UTF-16 BE
ISO-8859-1 (Latin-1)
Windows-1252
GBK / GB2312
Shift-JIS
EUC-JP
EUC-KR
Big5
Type to convert in real-time
Output
(UTF-8 .txt)
Scheme 11: Phone Keypad Letter Encoding
Phone keypad encoding maps the 26 English letters to the digits 2–9 according to the standard telephone keypad layout.
Commonly used for vanity phone numbers (e.g. 1-800-FLOWERS dials 1-800-3569377) and in multi-tap text entry systems.
Numbers 0 and 1 have no associated letters; 0 is treated as a space in this converter and 1 maps to itself.
Punctuation and non-alpha characters pass through unchanged when converting letters → numbers.
Keypad letters, T9 and phonewords
The letters on phone keys follow one international layout (ITU-T E.161): 2=ABC through 9=WXYZ, with no letters at all on 0 and 1 — which is why a phoneword never contains the digit 1. T9 was the predictive input method that guessed a whole word from one key press per letter, because each key stands for three or four letters.
The mapping is many-to-one: CALL and BALL both dial 2255, so decoding digits back to letters yields combinations rather than one answer — this page lists the alternatives.
