Convert Hours (hr) into other units of time e.g. s, d, mo, a

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Let's convert Hours (hr) to another unit of Time

This quick and easy calculator will convert Hours (hr) into other units of time e.g. s, d, mo, a

Choose a unit to convert Hours into:

Common
Days
(d)
Common
Months
(mo)
Common
Seconds
(s)
Common
Years
(a)
Minutes
(min)
Sidereal Days
(d-sr)
Sidereal Hours
(hr-sr)
Sidereal Minutes
(min-sr)
Sidereal Seconds
(s-sr)
Sidereal Years
(a-sr)
Tropical Years
(at)

Unit Information

Hour
/ˈaʊə/
Symbol: hr
Unit System: SI

What is the Hour?

The hour is a unit of time and is a multiple of an SI base unit with the symbol hr.

There are 60 seconds in a minute and 60 minutes in an hour. Consequently, there are 3600 seconds in an hour.

In a mean solar day, there are 24 hours.

Originally in the Middle East, the hour was defined as 1/12 of the day or night time. However, seasonal factors clearly affected all of these definitions and an average is used today to normalise and allow calculations.