Julian years (a)
The Julian year is exactly 365.25 days, the average year of the Julian calendar.
Convert Julian years to any time unit
1 Julian year = 365.25 days
Quick facts
- Unit
- Julian year (plural: Julian years)
- Symbol
- a
- Measures
- Time / Duration
- System
- Astronomical
- Equals
- 31,557,600 seconds
- Definition
- Exactly 365.25 days.
1 Julian year in other units
| Days | 365.25 d |
| Hours | 8,766 h |
| Minutes | 525,960 min |
| Seconds | 31,557,600 s |
| Years | 1.000020534 yr |
| Months | 12.00024641 mo |
| Weeks | 52.17857143 wk |
| Milliseconds | 31,557,600,000 ms |
What is a Julian year?
The Julian year is exactly 365.25 days, the average year of the Julian calendar. It is the standard year in astronomy: the light-year is defined with it.
Where the Julian year sits among time units
The Julian year is number 64 of 101 on our scale of time units, ordered from smallest to largest.
Julian years in real life
One Julian year is about 12 lunar months, or about 2 school years, or about 25% of a US presidential term, or about 1,096 working days.
Top Julian year conversions
Common amounts of Julian years
Convert Julian years to all 100 other units
Everyday
- a to d
- a to h
- a to min
- a to s
- a to yr
- a to mo
- a to wk
- a to c
- a to dec
- a to ka
- a to fn
- a to Q
- a to common year
- a to leap year
- a to semester
- a to 30-day month
- a to score (20 years)
Metric (SI)
Astronomical
- a to sidereal day
- a to synodic month
- a to tropical year
- a to Ma
- a to sidereal year
- a to Mars sol
- a to galactic year
- a to Ga
- a to sidereal month
- a to saros
- a to Mars year
- a to Metonic cycle
- a to Platonic year
- a to anomalistic year
- a to draconic year
- a to Jupiter day
- a to Sothic cycle
- a to Venus day
- a to anomalistic month
- a to draconic month
- a to Callippic cycle
- a to Gaussian year
- a to Hipparchic cycle
- a to Pluto year
- a to sidereal second
- a to tropical month
Scientific
Historical & cultural
- a to generation
- a to olympiad
- a to baktun
- a to decimal hour
- a to 刻
- a to 时辰
- a to .beat
- a to decimal minute
- a to decimal second
- a to ghati
- a to jubilee
- a to kalpa
- a to lustrum
- a to moment (medieval)
- a to muhurta
- a to yuga
- a to cd
- a to 更
- a to helek
- a to indiction
- a to kalabtun
- a to katun
- a to kin (Maya)
- a to mahayuga
- a to manvantara
- a to piktun
- a to triennium
- a to tun (Maya)
- a to vighati
- a to winal
Everyday comparisons
Convert to Julian years
Frequently asked questions
What is a Julian year?
The Julian year is exactly 365.25 days, the average year of the Julian calendar.
How is the Julian year defined?
Exactly 365.25 days.
How many days are in a Julian year?
One Julian year equals 365.25 days.
How many hours are in a Julian year?
One Julian year equals 8,766 hours.
How many minutes are in a Julian year?
One Julian year equals 525,960 minutes.