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NATO Phonetic Alphabet
Spell any name, code or postcode over the phone with the NATO/ICAO phonetic alphabet — type text and get November-Alfa-Mike-Echo instantly, with a per-letter reference chart. Uses the official ICAO spellings (Alfa, Juliett) and ICAO digit words (3 = Tree, 4 = Fower, 5 = Fife, 9 = Niner), with a toggle for the colloquial Alpha/Juliet forms. Computed entirely in your browser. Accurate, instant and free — for United States.
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Phonetic spelling
NATO / ICAO phonetic alphabet
- AAlfa
- BBravo
- CCharlie
- DDelta
- EEcho
- FFoxtrot
- GGolf
- HHotel
- IIndia
- JJuliett
- KKilo
- LLima
- MMike
- NNovember
- OOscar
- PPapa
- QQuebec
- RRomeo
- SSierra
- TTango
- UUniform
- VVictor
- WWhiskey
- XX-ray
- YYankee
- ZZulu
ICAO also alters some digit words for clarity: 3 = Tree, 4 = Fower, 5 = Fife, 9 = Niner.
Alfa/Juliett vs Alpha/Juliet, and the digit words
How we calculate this
Reviewed by Reckonist Editorial · Last reviewed July 2026. Figures follow the methods and sources set out in our editorial standards.
Phonetic words follow the ICAO/NATO alphabet defined in ICAO Annex 10, Volume II. The default uses the official ICAO spellings (Alfa, Juliett) and ICAO digit words (3 = Tree, 4 = Fower, 5 = Fife, 9 = Niner); the colloquial toggle uses the everyday Alpha/Juliet forms. Letters and digits not in the alphabet pass through unchanged.
ICAO Annex 10 · NATO phonetic alphabet
Sending the same message as beeps instead? Use the Morse Code Translator, or convert between units with the Unit Converter.
One distinct code word per letter
The NATO/ICAO phonetic alphabet replaces each letter with a code word — Alfa, Bravo, Charlie — chosen so no two sound alike over a phone or radio. Type text above to convert it instantly; here is the full reference chart.
Alfa vs Alpha, Juliett vs Juliet, and the digit words
ICAO (official)
Default
- Alfa (with an f)
- Juliett (two t's)
- Digits: 3 Tree · 4 Fower · 5 Fife · 9 Niner
Colloquial
Toggle
- Alpha
- Juliet
- Digits: 3 Three · 4 Four · 5 Five · 9 Nine
Why the odd spellings?
When to spell it out
Use it whenever a single wrong letter matters and the channel is unreliable: reading a name, postcode, licence plate, booking reference or serial numberover the phone, on a radio, or across a language barrier. Saying “B as in Bravo” instead of a bare “B” removes the classic B/P/T/D/V mix-up. It is the international standard for pilots, ships, the military, police and customer support.
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Frequently asked questions
It is a spelling alphabet that gives each letter A–Z a distinct code word — Alfa, Bravo, Charlie, Delta and so on — so that letters cannot be confused when spoken over a phone, radio or noisy line. It was standardised by the International Civil Aviation Organization (ICAO) and adopted by NATO, the military, aviation, shipping and emergency services, which is why it is variously called the NATO alphabet, the ICAO alphabet, the phonetic alphabet or the radio alphabet. The words were carefully chosen so that no two sound alike, even through static or a bad connection.
Type your name into the tool and each letter is replaced by its code word instantly. For example "MIKE" becomes Mike-India-Kilo-Echo, and "ZARA" becomes Zulu-Alfa-Romeo-Alfa. You can then copy the whole string to read out or paste into a message. This is exactly how call-centre agents, pilots and IT support confirm names, reference numbers and postcodes without mishearing — spelling "B as in Bravo" removes any doubt between similar-sounding letters like B, P, T, D and V.
Officially it is Alfa and Juliett — with those exact spellings. ICAO deliberately spells "Alfa" with an f (not "Alpha") and "Juliett" with two t's because many non-English speakers would otherwise pronounce a "ph" as /p/ or drop a single final "t". The words sound the same as the everyday spellings, so in casual use people often write Alpha and Juliet, and this tool offers a colloquial toggle for that. But for aviation, maritime and official radio use, Alfa and Juliett are the correct forms.
ICAO also defines spoken forms for the digits, and several differ from ordinary English to survive a noisy channel: 3 is "Tree", 4 is "Fower", 5 is "Fife" and 9 is "Niner" (so nine is not confused with the German "nein" or misheard as five). The rest are close to normal — Zero, One, Two, Six, Seven, Eight. The colloquial toggle in this tool switches these back to the plain Three, Four, Five and Nine if you prefer, but the Tree/Fower/Fife/Niner forms are what you will hear on aviation radio.
Because spoken letters are easy to confuse. Over a phone or radio, "B", "P", "T", "D", "V" and "C", "Z", "S" all blur together, and a single wrong letter can mean the wrong flight, order, or address. Replacing each letter with a long, distinct word — Bravo, Papa, Tango — makes it unambiguous even through heavy static or a strong accent. It has been the international standard since the 1950s and is used by pilots, ships, the military, police, and everyday customer service to read out names, codes, licence plates and reference numbers reliably.
Standards & references
Method: each letter is mapped to its ICAO code word (Alfa … Zulu) and each digit to its ICAO spoken form (with 3 = Tree, 4 = Fower, 5 = Fife, 9 = Niner); a colloquial toggle switches to Alpha/Juliet and plain digit words. Case-insensitive; punctuation and spaces pass through. Everything runs in your browser — nothing is uploaded.
How we calculate this
Reviewed by Reckonist Editorial · Last reviewed 5 July 2026. Figures follow the methods and sources set out in our editorial standards.
This tool converts text to the NATO/ICAO phonetic alphabet locally in your browser using the official ICAO Annex 10 spellings (Alfa, Juliett) and digit words. A colloquial toggle offers the everyday Alpha/Juliet forms for casual use.
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Same-category tools follow this colour; a cross-category link keeps its own.