Hour:

The hour is a time measurement unit that equals 60 minutes, 3,600 seconds or 1/24 of a solar day. SI recognises and uses the unit, which bears the sign h. The use of an hour as a portion of a solar day is said to have begun in the epochs of Ancient Egypt. The notion of an hour arose in the early 13th century when scholars in Ancient Greece proposed splitting a solar day perfectly into 24 equal parts. The hour is a time measurement unit widely used in science to define a variety of related measurement units such as kilometres per hour, ampere-hour, kilowatt-hour, and so on.

Minute:

A minute is a time measurement unit equal to 60 seconds or 1/60 of an hour. This measuring unit is considered new (compared to an hour or second). Its history began only in the Middle Ages when the first water-powered time-keeping devices were constructed instead of the traditional sun or sand clocks. Minutes are also used in geometry to measure angles and to define the latitude and longitude of any location on the earth's surface.

Hour To Minute Conversion: