used to indicate time in relation to a 24-hour clock O evento é hoje, às 20 h ― The event is today at 8 p. The perceived name of the letter affects the choice of indefinite article before initialisms beginning with H: for example "an H-bomb" or "a H-bomb". Preposition h is a form of preposition k that appears before words that start with /k/ or /ɡ/ while other form is used for all other words.

and all encodings based on ASCII, including the DOS, Windows, ISO-8859, and Macintosh families of encodings.

In English, ⟨h⟩ occurs as a single-letter grapheme (being either silent or representing the voiceless glottal fricative ( / h/) and in various digraphs, such as ⟨ch⟩ / tʃ/, / ʃ/, / k/, or / x/), ⟨gh⟩ (silent, /ɡ/, /k/, /p/, or /f/), ⟨ph⟩ ( /f/), ⟨rh⟩ ( /r/), ⟨sh⟩ ( / ʃ/), ⟨th⟩ ( / θ/ or / ð/), ⟨wh⟩ ( / hw/ [8]). For the dialects lacking the aspiration, this meant a complication added to the standardized spelling.

Specific to the IPA, a hooked ⟨ ɦ⟩ is used for a voiced glottal fricative, and a superscript ⟨ ʰ⟩ is used to represent aspiration. Its name in English is aitch (pronounced / eɪ tʃ/, plural aitches), or regionally haitch / h eɪ tʃ/. In Ukrainian and Belarusian, when written in the Latin alphabet, ⟨h⟩ is also commonly used for /ɦ/, which is otherwise written with the Cyrillic letter ⟨г⟩. American English Dictionary (1): H¹ American English Dictionary (1): H² American English Dictionary (1): H³ American English Dictionary (1): h¹ American English Dictionary (1): h² American English Dictionary (1): h³ American English Dictionary (2): h¹ American English Dictionary (2): h² American English Dictionary (2): H American English Dictionary (2): H¹ American English Dictionary (2): H² American English Dictionary (2): H³ American English Dictionary (2): H⁴ American English Dictionary (2): H⁵ American English Dictionary (2): h. Definitions and other text are available under the Creative Commons Attribution-ShareAlike License; additional terms may apply.

In words where the ⟨h⟩ is derived from a Latin /f/, it is still sometimes pronounced with the value [h] in some regions of Andalusia, Extremadura, Canarias, Cantabria, and the Americas. Over time, some of the loaned Spanish words still spelled with the silent ⟨h⟩ are spoken with /h/ due to spelling pronunciation, as people are becoming less aware of the letter being silent.