Hourunit of time / From Wikipedia, the free encyclopedia 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 one day. Unlike the second, the hour is not a base SI unit. Wikimedia Commons has media related to Hour. This short article about science can be made longer. You can help Wikipedia by adding to it.
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 one day. Unlike the second, the hour is not a base SI unit. Wikimedia Commons has media related to Hour. This short article about science can be made longer. You can help Wikipedia by adding to it.