›› Measurement unit: hours

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 hours.

›› Convert hours to another unit

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Valid units must be of the time type.
You can use this form to select from known units:

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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: hours

hours to millisecond
hours to day
hours to week
hours to lunar year
hours to Gaussian year
hours to tropical year
hours to millennium
hours to fortnight
hours to Gregorian month
hours to sidereal year