How many hour in 1 day?
The answer is 24.
We assume you are converting between hour and day.
You can view more details on each measurement unit:
hour or day
The SI base unit for time is the second.
1 second is equal to 0.000277777777778 hour, or 1.15740740741E-5 day.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between hours and days.
Type in your own numbers in the form to convert the units!
You may also want to find out how many days are between two dates on the calendar. Use the date calculator to get your age in days or measure the duration of an event.
You can do the reverse unit conversion from day to hour, or enter any two units below:
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The hour was originally defined in Egypt as 1/24 of a day, based on their duo-decimal numbering system (which counted finger joints on each hand).
A continous period of 24 hours which, unless the context otherwise requires, runs from midnight to midnight.
ConvertUnits.com provides an online conversion calculator for all types of measurement units. You can find metric conversion tables for SI units, as well as English units, currency, and other data. Type in unit symbols, abbreviations, or full names for units of length, area, mass, pressure, and other types. Examples include mm, inch, 100 kg, US fluid ounce, 6'3", 10 stone 4, cubic cm, metres squared, grams, moles, feet per second, and many more!