Hour

An hour (abbreviation: h or hr) is a unit of measurement used to measure time. An hour is equal to 60 minutes. 24 hours are equal to 1 day. Unlike the second, the hour is not a base SI unit.

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v t e SI units
Authority: International System of Units (BIPM)
Base units	ampere candela kelvin kilogram metre mole second
Units based on other units	becquerel coulomb degree Celsius farad gray henry hertz joule katal lumen lux newton ohm pascal radian siemens sievert steradian tesla volt watt weber
Other SI units	astronomical unit bar dalton day decibel degree of arc electronvolt hectare hour litre minute minute of arc neper second of arc tonne atomic units natural units
See also	Conversion of units Metric prefixes Systems of measurement
Category

Hour

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