The hour (symbol: h) is a unit of time that's traditionally defined as 1/24 of the day, or 3,600 seconds. For Coordinated Universal Time, a leap second may be added to keep the hour within 0.9 seconds of universal time; in some cases, an hour will be 3,599 or 3,601 seconds long.
The word hour comes from the Anglo-Norman "houre," which first appeared around the 13th century.
Hours have had many different definitions throughout history, such as being a division of the daylight or nighttime periods. It is believed that the 24-hour cycle was started by the Ancient Egyptians.
The hour is a unit of time that is used around the world. It's common for most jobs to have a set number of hours per day, with compensation based on the measured or expected hours. Durations starting from 30 minutes (30 minutes) are often used colloquially.
A day is an accepted unit of time that you can measure with a stopwatch. The accepted definition of a day is 86,400 seconds in length.
The term "day" originates from the Old English word dæg. This can be roughly translated as the time it takes for Earth to complete one rotation with respect to the Sun. In order to measure this, we redefine a day by linking it to how fast the Earth orbits the Sun in 1900. We then redefine a second in 1967, when atomic electron transitions helped us pinpoint time.
A day is typically used in reference to a period of 24 hours, but it can also refer to daytime or the moment the sun is up in your part of the world. It's also common phrasing like "six o' clock in the evening."
Hour to Day Conversion Table
Hour [h] Day [d]
0.01 h 0.0004166667 d
0.1 h 0.0041666667 d
1 h 0.0416666667 d
2 h 0.0833333333 d
3 h 0.125 d
5 h 0.2083333333 d
10 h 0.4166666667 d
20 h 0.8333333333 d
50 h 2.0833333333 d
100 h 4.1666666667 d
1000 h 41.6666666667 d
How to Convert Hour to Day
1 h = 0.0416666667 d
1 d = 24 h
Example: Convert 15 h to d:
15 h = 15 × 0.0416666667 d = 0.625 d
A unit converter is an online free tool that enables you to convert one unit of measurement into another.
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An online conversion calculator helps you convert all types of the measurement unit.