1H

1H or 1-H may refer to:

Science

 * Hydrogen (1H), a chemical element
 * 1H, a number of chemical compounds with one hydrogen atom
 * Hydrogen-1 (1H, or Protium), an isotope of hydrogen
 * 1H, a grouping within an Astronomical catalog
 * 1H 1617-155, a designation for the Scorpius X-1 X-ray source
 * 1H 1908+047, a designation for the SS 433 star system
 * Astra 1H, an SES satellite launched in 1999

Other uses

 * 1H, a model of Nissan H engine
 * 1H NMR, a type of Proton NMR
 * 1 H. Cas, a variant notation for AR Cassiopeiae
 * UH-1H, a type of Bell UH-1 Iroquois
 * Campath-1H, a brand of Alemtuzumab
 * Ardiden 1H, a model of HAL/Turbomeca Shakti
 * Blendkörper 1H, smoke grenade used by Germany in World War II
 * SSH 1H, alternate name for Washington State Route 534
 * 1H, one hour
 * 1H Year, 1st half of year