NATO Phonetic Alphabet Converter
Spell names and codes with Alfa, Bravo, Charlie, and the full list.
What it does
Noisy radios mangle lookalike letters, so aviation and maritime voices spell with fixed code words: M and N become Mike and November, B and D become Bravo and Delta. The NATO list has carried that job since 1956 with identical words across allies.
The tool above converts letters and digits to code words and counts them. The default SOS 911 gives Sierra Oscar Sierra Nine One One: 6 code words from 3 letters plus 3 digits.
Spellings follow the standard exactly, quirks included: Alfa with one L, Juliett with two Ts, and X-ray hyphenated. NATO history pages with FAA radio phraseology print the same 26 plus digits Zero through Nine.
Case and spacing never matter to the words. Lowercase converts like uppercase, and spaces only split the stream; punctuation has no code word and stays out.
How to use
- Type letters and digits, up to 200 characters.
- Skip punctuation; it has no code word.
- Read spelling first, count beside it.
- Say digits singly: 911 is Nine One One.
- Stress Juliett and X-ray spellings in writing.
- Pair with Morse for dual mode practice.
Formula
- letters
- A to Z map to the 26 code words.
- digits
- 0 to 9 map to Zero through Nine.
- spaces
- Word breaks with no code word.
Effective NATO-wide March 1 1956. Pronunciation guides ride along in radio manuals, such as AL-FAH and JEW-LEE-ETT, but words stay fixed.
Worked example
Example: SOS 911
Default text: SOS 911.
- S maps Sierra, O Oscar, S Sierra.
- 9 maps Nine, 1 One, 1 One.
- Join: Sierra Oscar Sierra Nine One One.
- Count: 6 code words, 3 letters plus 3 digits.
- KAMI check: Kilo Alfa Mike India.
- Tool shows the spelling with 6 code words.
Reference table
| Letters | Words | Note |
|---|---|---|
| A | Alfa | One L, not Alpha |
| J | Juliett | Two Ts |
| X | X-ray | Hyphenated |
| A to E | Alfa Bravo Charlie Delta Echo | Opening run |
| S O S | Sierra Oscar Sierra | Distress letters |
| 0, 9 | Zero, Nine | Digits said singly |
| KAMI 2026 | Kilo Alfa Mike India Two Zero Two Six | 8 code words |
Limits
- Letters and digits only; no punctuation words.
- Spelling aid, not encryption.
- Pronunciation varies by accent.
- 200 characters per run.
Common mistakes
- Writing Alpha for Alfa.
- Single T Juliett.
- Xray without the hyphen.
- Saying 911 as nine eleven on radio.
- Using military words off list.
Try it yourself
Quick checks. Answers sit tucked under each question.
Spell KAMI?
Kilo Alfa Mike India.
Single A?
Alfa, 1 code word.
J and X spellings?
Juliett with two Ts; X-ray hyphenated.
Questions
What is SOS 911?
Sierra Oscar Sierra Nine One One.
Alpha or Alfa?
Alfa with one L in the standard.
Since when?
Effective NATO-wide March 1 1956.
FAA same list?
Yes, the ICAO alphabet FAA personnel use matches.
Digits how?
Singly: Zero through Nine, so 2026 is Two Zero Two Six.
Punctuation?
No code words; the tool rejects it.