PH (disambiguation)

pH is a measure of acidity or alkalinity.

PH, ph, pH, and Ph may also refer to:

Arts and media

Pakatan Harapan (also known as "Alliance of Hope"), a political coalition in Malaysia

Port Harcourt, (alternative name of the city)
Philippines (ISO country code PH)
- .ph, the Philippines' Internet country code top-level domain

Phenyl group, either -Ph or Φ, highly-stable and aromatic hydrocarbon unit found in many organic compounds
Pleckstrin homology domain, a part of many proteins which bind phosphoinositides with high affinity

.ph, the Philippines' Internet country code top-level domain
Ph protocol, an early web database search for CCSO Nameserver described by RFC 2378

PH (complexity), the union of all complexity classes in the polynomial hierarchy in computational complexity theory
Planet Hunters, a group that hunts for exoplanets
Precipitation hardening, a heat treatment technique used to increase the yield strength of malleable materials
Pulmonary hypertension, a medical condition

pʰ, a phoneme
Ph (digraph), a common digraph that represents the phoneme /f/ (voiceless labiodental fricative) in phonetics
(ph), a notation used in transcripts to indicate that the transcriber does not know the spelling, usually of a name, and has spelled it as it was pronounced (phonetically)
Preston Hollow, Dallas, a neighborhood
Poul Henningsen (1894–1967), a Danish writer and designer referred to as PH in Denmark
Public house, on maps
Purple Heart, a US military award, in post-nominal designation
Parker-Hannifin Corporation (stock ticker PH)
Pinch hitter, in baseball
abbreviation used to denote the English regnal years of Philip II of Spain
P^ḥ, abbreviation (e.g. on maps) for parish, also in the meaning of civil parish