hour [h] Unit Converter

Definition of hour [h] unit

An hour is a unit of time equal to 60 minutes, 3,600 seconds, or 1/24 of a conventional 24-hour day. It is used to measure durations and schedule events in everyday life, science, transportation, business, and timekeeping.

History of hour [h] unit

The hour has ancient roots in Babylonian and Egyptian timekeeping. Egyptians divided daylight and darkness into twelve parts each, producing hours whose length changed with the seasons. Babylonian astronomers used base-60 mathematics, a tradition that influenced the division of an hour into 60 minutes and each minute into 60 seconds. Greek and Roman systems adapted these ideas, while mechanical clocks in medieval Europe gradually established more uniform hours. With improved clocks and standardized time zones, the hour became a recognized civil and scientific unit, although local practices once varied considerably.

Applications of hour [h] unit

Hours are used to organize daily schedules, operating times, work shifts, appointments, school periods, travel, and broadcast programming. In science and engineering, hours express durations such as battery life, machine operation, or exposure. Utilities may bill electricity in kilowatt-hours, while speed and productivity are often evaluated over hourly intervals of time.

Complete list of hour [h] unit conversion

• second [s] = 0.00027777777777778 hour [h]
• millisecond [ms] = 2.7777777777778E-7 hour [h]
• minute [min] = 0.016666666666667 hour [h]
• day [d] = 24 hour [h]
• week = 168 hour [h]
• month = 730.5 hour [h]
• year [y] = 8766 hour [h]
• decade = 87660 hour [h]
• century = 876600 hour [h]
• millennium = 8766000 hour [h]
• microsecond [µs] = 2.7777777777778E-10 hour [h]
• nanosecond [ns] = 2.7777777777778E-13 hour [h]
• picosecond [ps] = 2.7777777777778E-16 hour [h]
• femtosecond [fs] = 2.7777777777778E-19 hour [h]
• attosecond [as] = 2.7777777777778E-22 hour [h]
• shake = 2.7777777777778E-12 hour [h]
• month (synodic) = 708.73413888889 hour [h]
• year (Julian) = 8766 hour [h]
• year (leap) = 8784 hour [h]
• year (tropical) = 8765.81256 hour [h]
• year (sidereal) = 8766.152712096 hour [h]
• day (sidereal) = 23.934469591898 hour [h]
• hour (sidereal) = 0.99726956632908 hour [h]
• minute (sidereal) = 0.016621159438818 hour [h]
• second (sidereal) = 0.0002770193239803 hour [h]
• fortnight = 336 hour [h]
• septennial = 61362 hour [h]
• octennial = 70128 hour [h]
• novennial = 78894 hour [h]
• quindecennial = 131490 hour [h]
• quinquennial = 43830 hour [h]
• Planck time = 1.4975686111111E-47 hour [h]