›› Measurement unit: hour

Full name: hour

Plural form: hours

Symbol: hr

Alternate spelling: hrs

Category type: time

Scale factor: 3600


›› SI unit: second

The SI base unit for time is the second.
1 second is equal to 0.000277777777778 hour.


›› Convert hour to another unit

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›› Definition: Hour

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).


›› Sample conversions: hour

hour to minute
hour to decade
hour to millennium
hour to quarter
hour to microsecond
hour to week
hour to fortnight
hour to month
hour to millisecond
hour to day


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