How it works
This romaji to katakana converter writes the sounds you type in katakana: konpyuuta comes out as コンピュータ. It follows Hepburn spelling and reads katakana back into romaji.
Read the full guide
Long vowels, doubled consonants and n
A long vowel is the bar ー. Type it as a macron (kōhī), a doubled vowel (koohii) or a hyphen (ko-hi-): all three give コーヒー. Double a consonant for the small ッ: kitte is キッテ, and matcha is マッチャ, since ch doubles as tch. An n with no vowel after it is ン, and n' holds it apart from one: kin'en is キンエン.
Translate katakana to romaji
Press Swap and paste katakana. It comes back in Hepburn with macrons: セーラー is sērā and タクシー is takushī. ン in front of a vowel gets its apostrophe back.
- Two of the same vowel make one long vowel. For two separate vowels, as in ミイラ, type a space between them, then close it up.
- ti, tu, di and du give ティ, トゥ, ディ and ドゥ. For チ and ツ type chi and tsu.
- Typed wo, ji and zu give ウォ, ジ and ズ. Their twins ヲ, ヂ and ヅ can be read back but not typed.
Questions and answers
Can the katakana converter turn English into katakana?
Only once the sound is spelled in romaji. Typed as English, computer comes out as cオンプテr, because c and a lone r have no kana. Typed as konpyūta it is コンピュータ. Look the spelling of a loanword up in a dictionary.
What is the difference between ō and ou in katakana?
ō is one long vowel and writes the bar: sōru is ソール. ou is two vowels and writes two kana: souru is ソウル. Hepburn keeps the two spellings apart for that reason, and so does this table.
Which romaji spellings does it read?
Hepburn first: shi, chi, tsu, fu, ji. It also takes si, hu, zi, sya and zya from the Nihon-shiki system, jya for ジャ, and the m that older Hepburn writes before b, m or p. Shimbun and shinbun both give シンブン.