How to convert hours to days
To convert a measurement in hours to days, multiply the value by 0.041666666667. The conversion factor comes from the relationship between both units and the second.
For example, to convert 5 h to days: 5 × 0.041666666667 = 0.208333333333 d.
What is a hour?
An hour is a unit of time equal to 60 minutes or 3,600 seconds. There are 24 hours in a day. The hour originated in ancient Egypt, where day and night were each divided into 12 parts. The fixed 60-minute hour became standard only after mechanical clocks made equal hours practical.
Common uses of hours include: Work shifts and hourly wages; Travel and flight durations; TV schedules and event planning; Battery life and runtime ratings.
What is a day?
A day is a unit of time equal to 24 hours or 86,400 seconds, based on one full rotation of the Earth on its axis. The day is humanity's oldest natural time unit, set by the cycle of light and dark. The exact 86,400-second day is a civil convention; the true solar day varies slightly through the year.
Common uses of days include: Calendars and daily scheduling; Project timelines and deadlines; Shipping and delivery estimates; Medication dosing intervals.
Hours to days worked examples
Here are some common values converted:
1 h = 0.041666666667 d 5 h = 0.208333333333 d 10 h = 0.416666666667 d 50 h = 2.083333 d 100 h = 4.166667 d
Frequently asked questions
How many days are in one hour?
One hour (h) equals 0.041666666667 days (d). Multiply any value in hours by 0.041666666667 to convert to days.
How do I convert hours to days?
Multiply the value in hours by 0.041666666667. For example, 5 h × 0.041666666667 = 0.208333333333 d.
How do I convert days to hours?
Multiply the value in days by 24, or divide by 0.041666666667. Use the swap button on the converter above to reverse the direction.
Is the hour to day conversion exact?
Fixed units (second through week) are exact. Month and year use the average Gregorian calendar length (30.44 and 365.2425 days) since these vary in practice.
What is the formula for hours to days?
The formula is: d = h × 0.041666666667. This comes from the definition of both units relative to the second.