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 0.00027777777777778 hour.



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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