To convert hours to decimal using a calculator, simply divide the number of minutes by 60. The abbreviation for the 'Time unit Minute' is min. The quickest and easiest way to add time is to convert the minutes to decimal format. The abbreviation for the 'Time unit Hour' is h. Basis for conversion Hour (h) to Minute (min) and vice versa As a result, a calendar minute then lasts 61 seconds. Therefore, a leap second must be added every 2 to 5 years in order to synchronise the atomic clocks with the earth's rotation again. You can use the following calculator to add hours, minutes, and seconds. 20, giving you 10:12 (10 hours and 12 minutes). So in the above example, you would multiply 60 by. The basic unit of time (the second) is now measured by atomic clocks, which are more accurate than the astronomical day. To convert the decimal total back to the normal hours and minutes format (HH:MM), you multiply the decimal portion by 60. It is now known that the earth's rotation slightly slows down, so the astronomical days always become minimally longer. Therefore, the minute was defined astronomically as one-60th of an hour, and thus as one-60th of one-24th of a day. A minute is a unit of time equal to 60 seconds. Whenever one wants to convert hours to minutes, one can just multiply the number of hours with 60 and get the hours converted into minutes. Type in the amount you want to convert and press the Convert button. The “minutes” were again subdivided into 60 subunits (i.e., a 'second diminished part' (Latin: pars minuta secunda), which in turn is termed 'second'. An hour is a unit of time equal to 60 minutes, or 3,600 seconds. So, for example, if one wants to convert 3 hours into minutes, one can do it by multiplying 3 with sixty which will give 3 x 60 180 minutes. These 60 units were known as the 'diminished part' (Latin: pars minuta), and this led to the term called “minute”. Therefore, 1 minute equals 60 seconds, or 1 second equals 0.0166667 minutes.Īfter the day had already been divided into 24 units in ancient Egypt, Greek astronomers began 2000 years to divide each of these 24 units into 60 units using the Babylonian sexagesimal system. This makes it a legal unit of measurement. The minute is derived from the base unit second. The minute (min) is not part of the SI International System of Units, but it is approved for use with the SI. Time Calculator (Hour Minute Calculator) hh:mm:ss.ms, hh hours, mm minutes, ss seconds, ms milliseconds 10:30:28.12, 10 hours, 30 minutes, 28 seconds, 120. To synchronise the present accurate atomic clocks with the duration of the earth's rotation, a leap second had to be inserted every 2 to 5 years for one hour to make 3,601 seconds. To convert from seconds to hours, divide the number of seconds by 3600 this works for converting seconds to decimal hours. For the default time of 2:45:45 in the converter, lets convert to just hours, then just minutes, and then just seconds. At the same time, quartz clocks were able to measure time more accurately, making the second the basic unit. The hour was only reverted to the basic unit of the second in the middle of the 20th century after it was established and the astronomical day or one revolution of the Earth, was becoming shorter and shorter, albeit only minimally.

This means that even today, the day still has 24 hours. Of course, sundials could not be used at night, so the Egyptians used the course of 12 stars to divide the night into 12-time units. The twelve-unit system may have originated historically from the fact that one individual finger links (three links per finger without thumb) were used for counting.

But how did the day originally change to a division of the day into 24 hours? In ancient Egypt, sundials were used to divide the day into 24 hours based on the common system (duodecimal system) at the time.

Here, 1 hour is equal to 3,600 seconds or 1 second is equal to 0.00027778 hours (3,600ths).įor thousands of years-before the hour was officially defined as 3,600 times a second-it was considered the 24th part of a day. The hour is derived from the base unit second. Minutes converted to hours and hours, minutes & seconds.The hour (h) (Latin: hora) is not part of the International SI System of Units, but it is permitted for use with the SI. Hours can be abbreviated as hr (plural hrs) for example, 1 hour can be written as 1 hr, and 2 hours can be written as 2 hrs. The hour is an SI accepted unit for time for use with the metric system. The hour is a period of time equal to 1/24 of a day or 60 minutes. Use this calculator to find the duration between two times or dates in hours, minutes, and seconds.

Hours to minutes converter