Hours (h)
The hour is a unit of time equal to 60 minutes or 3,600 seconds, one twenty-fourth of a day.
Convert hours to any time unit
1 hour = 0.04166666667 days
Quick facts
- Unit
- Hour (plural: hours)
- Symbol
- h
- Measures
- Time / Duration
- System
- Everyday
- Equals
- 3,600 seconds
- Definition
- 60 minutes, 3,600 seconds.
- Also written
- hr, hrs
1 hour in other units
| Days | 0.04166666667 d |
| Minutes | 60 min |
| Seconds | 3,600 s |
| Years | 0.000114079459 yr |
| Months | 0.001368953503 mo |
| Weeks | 0.005952380952 wk |
| Milliseconds | 3,600,000 ms |
| Centuries | 0.000001140795 c |
What is an hour?
The hour is a unit of time equal to 60 minutes or 3,600 seconds, one twenty-fourth of a day. It is not an SI unit but is accepted for use with it, and it appears in derived units such as kilometers per hour and kilowatt-hours.
Where the hour sits among time units
The hour is number 35 of 101 on our scale of time units, ordered from smallest to largest.
What hours are used for
- Work schedules and wages (hourly pay)
- Speed (km/h, mph)
- Energy (kilowatt-hours)
- Travel and flight times
Hours in real life
- A full-time work week is about 40 hours
- A flight from London to New York takes about 8 hours
- Adults need about 7–9 hours of sleep
- The Earth rotates 15° per hour
One hour is about 2.7 sitcom episodes, or about 17 pop songs, or about 50% of a feature film, or about 49% of an elite marathon.
Top hour conversions
Common amounts of hours
- 0.1 h
- 0.2 h
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- 1 h
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- 5,000 h
- 10,000 h
Convert hours to all 100 other units
Everyday
- h to d
- h to min
- h to s
- h to yr
- h to mo
- h to wk
- h to c
- h to dec
- h to ka
- h to fn
- h to Q
- h to common year
- h to leap year
- h to semester
- h to 30-day month
- h to score (20 years)
Metric (SI)
Astronomical
- h to a
- h to sidereal day
- h to synodic month
- h to tropical year
- h to Ma
- h to sidereal year
- h to Mars sol
- h to galactic year
- h to Ga
- h to sidereal month
- h to saros
- h to Mars year
- h to Metonic cycle
- h to Platonic year
- h to anomalistic year
- h to draconic year
- h to Jupiter day
- h to Sothic cycle
- h to Venus day
- h to anomalistic month
- h to draconic month
- h to Callippic cycle
- h to Gaussian year
- h to Hipparchic cycle
- h to Pluto year
- h to sidereal second
- h to tropical month
Scientific
Historical & cultural
- h to generation
- h to olympiad
- h to baktun
- h to decimal hour
- h to 刻
- h to 时辰
- h to .beat
- h to decimal minute
- h to decimal second
- h to ghati
- h to jubilee
- h to kalpa
- h to lustrum
- h to moment (medieval)
- h to muhurta
- h to yuga
- h to cd
- h to 更
- h to helek
- h to indiction
- h to kalabtun
- h to katun
- h to kin (Maya)
- h to mahayuga
- h to manvantara
- h to piktun
- h to triennium
- h to tun (Maya)
- h to vighati
- h to winal
Everyday comparisons
Convert to hours
Frequently asked questions
What is an hour?
The hour is a unit of time equal to 60 minutes or 3,600 seconds, one twenty-fourth of a day.
How is the hour defined?
60 minutes, 3,600 seconds.
How many days are in an hour?
One hour equals 0.04166666667 days.
How many minutes are in an hour?
One hour equals 60 minutes.
How many seconds are in an hour?
One hour equals 3,600 seconds.