Convert Hours to Days
Convert Hours to Days instantly. 1 Hour (h) equals 0.04167 Days (d).
Hours to Days conversion table
| Hours (h) | Days (d) |
|---|---|
| 1 h | 0.04167 d |
| 2 h | 0.08333 d |
| 3 h | 0.125 d |
| 5 h | 0.2083 d |
| 10 h | 0.4167 d |
| 20 h | 0.8333 d |
| 50 h | 2.0833 d |
| 100 h | 4.1667 d |
| 500 h | 20.8333 d |
| 1,000 h | 41.6667 d |
1 Hour = 0.04167 Days · multiply Hours by 0.04167
About converting Hours to Days
Hours (h) and Days (d) are both units of time, so converting between them is a single multiplication: multiply your Hours figure by 0.04167. Ten Hours comes to 0.4167 Days, and a hundred works out at 4.1667 Days.
Rule of thumb: going from Hours to Days divides, so the figure always shrinks — it takes about 24 Hours to make a single Day. If your answer came out bigger, you have the conversion the wrong way round.
What is a Hour?
An hour is sixty minutes, and the twenty-four-hour day it divides comes from ancient Egypt, though the sixty inside it is Babylonian. For most of history hours were not equal: daylight was split into twelve parts and the night into twelve more, so an hour was simply longer in summer than in winter. Only mechanical clocks made fixed hours practical, since a clock cannot easily be told to run slower in December. The hour is not an SI unit but is accepted for use with SI, and it remains the unit almost all paid work is priced in.
What is a Day?
A day is exactly 86,400 seconds — and that is a statement about the unit, not about the Earth. A real solar day varies slightly depending on winds, tides and what the planet’s core is doing, and tidal friction is gradually lengthening it. The gap between the tidy unit and the untidy planet is what leap seconds patch over. Astronomers also distinguish the solar day from the sidereal day, one full rotation relative to the stars, which is about four minutes shorter because the Earth has meanwhile moved along its orbit.
To put both in perspective: an hour is a standard slot in most people’s calendars, while a day is one turn of the Earth on its axis.
The converter above updates as you type, and the table lists common values for quick reference. Need the opposite direction? Use the Days to Hours converter, or browse all Time converters.
Frequently asked questions
How many Days are in one Hour?
There are 0.04167 Days in one Hour.
How do I convert Hours to Days?
Multiply the number of Hours by 0.04167. For example, 10 Hours = 0.4167 Days.
What is 100 Hours in Days?
100 Hours is equal to 4.1667 Days.
How do I convert Days to Hours?
Multiply the Days value by 24 (or divide by 0.04167).
Is this Hours to Days conversion exact?
The definition is exact — Hours and Days are both fixed against the same base by international agreement — but the decimal shown here is rounded for readability, because the true ratio does not terminate. For engineering or scientific work, carry more decimal places than this page displays.
What is a Hour?
An hour is sixty minutes, and the twenty-four-hour day it divides comes from ancient Egypt, though the sixty inside it is Babylonian. For most of history hours were not equal: daylight was split into twelve parts and the night into twelve more, so an hour was simply longer in summer than in winter. Only mechanical clocks made fixed hours practical, since a clock cannot easily be told to run slower in December. The hour is not an SI unit but is accepted for use with SI, and it remains the unit almost all paid work is priced in.
What is a Day?
A day is exactly 86,400 seconds — and that is a statement about the unit, not about the Earth. A real solar day varies slightly depending on winds, tides and what the planet’s core is doing, and tidal friction is gradually lengthening it. The gap between the tidy unit and the untidy planet is what leap seconds patch over. Astronomers also distinguish the solar day from the sidereal day, one full rotation relative to the stars, which is about four minutes shorter because the Earth has meanwhile moved along its orbit.