Decades (dec)
A decade is a period of ten years. In everyday speech decades are named by their tens digit ("the 1990s").
Convert decades to any time unit
1 decade = 3,652.425 days
Quick facts
- Unit
- Decade (plural: decades)
- Symbol
- dec
- Measures
- Time / Duration
- System
- Everyday
- Equals
- 315,569,520 seconds
- Definition
- 10 years.
1 decade in other units
| Days | 3,652.425 d |
| Hours | 87,658.2 h |
| Minutes | 5,259,492 min |
| Seconds | 315,569,520 s |
| Years | 10 yr |
| Months | 120 mo |
| Weeks | 521.775 wk |
| Milliseconds | 315,569,520,000 ms |
What is a decade?
A decade is a period of ten years. In everyday speech decades are named by their tens digit ("the 1990s").
Where the decade sits among time units
The decade is number 73 of 101 on our scale of time units, ordered from smallest to largest.
Decades in real life
- The 1960s ran from 1960 to 1969
One decade is about 2.5 presidential terms, or about 20 school years, or about 124 lunar months, or about 14% of a human lifetime.
Top decade conversions
Common amounts of decades
- 0.25 dec
- 0.5 dec
- 0.75 dec
- 1 dec
- 1.5 dec
- 2 dec
- 2.5 dec
- 3 dec
- 4 dec
- 5 dec
- 6 dec
- 7 dec
- 8 dec
- 9 dec
- 10 dec
- 11 dec
- 12 dec
- 13 dec
- 14 dec
- 15 dec
- 16 dec
- 17 dec
- 18 dec
- 19 dec
- 20 dec
- 21 dec
- 22 dec
- 23 dec
- 24 dec
- 25 dec
- 26 dec
- 27 dec
- 28 dec
- 29 dec
- 30 dec
- 31 dec
- 32 dec
- 33 dec
- 34 dec
- 35 dec
- 36 dec
- 37 dec
- 38 dec
- 39 dec
- 40 dec
- 41 dec
- 42 dec
- 43 dec
- 44 dec
- 45 dec
- 46 dec
- 47 dec
- 48 dec
- 49 dec
- 50 dec
- 60 dec
- 70 dec
- 80 dec
- 90 dec
- 100 dec
- 150 dec
- 200 dec
- 250 dec
- 300 dec
- 400 dec
- 500 dec
- 750 dec
- 1,000 dec
Convert decades to all 100 other units
Everyday
- dec to d
- dec to h
- dec to min
- dec to s
- dec to yr
- dec to mo
- dec to wk
- dec to c
- dec to ka
- dec to fn
- dec to Q
- dec to common year
- dec to leap year
- dec to semester
- dec to 30-day month
- dec to score (20 years)
Metric (SI)
- dec to ms
- dec to µs
- dec to ns
- dec to ps
- dec to fs
- dec to as
- dec to cs
- dec to ks
- dec to ds
- dec to Gs
- dec to Ms
- dec to zs
- dec to ys
- dec to Ts
Astronomical
- dec to a
- dec to sidereal day
- dec to synodic month
- dec to tropical year
- dec to Ma
- dec to sidereal year
- dec to Mars sol
- dec to galactic year
- dec to Ga
- dec to sidereal month
- dec to saros
- dec to Mars year
- dec to Metonic cycle
- dec to Platonic year
- dec to anomalistic year
- dec to draconic year
- dec to Jupiter day
- dec to Sothic cycle
- dec to Venus day
- dec to anomalistic month
- dec to draconic month
- dec to Callippic cycle
- dec to Gaussian year
- dec to Hipparchic cycle
- dec to Pluto year
- dec to sidereal second
- dec to tropical month
Scientific
Historical & cultural
- dec to generation
- dec to olympiad
- dec to baktun
- dec to decimal hour
- dec to 刻
- dec to 时辰
- dec to .beat
- dec to decimal minute
- dec to decimal second
- dec to ghati
- dec to jubilee
- dec to kalpa
- dec to lustrum
- dec to moment (medieval)
- dec to muhurta
- dec to yuga
- dec to cd
- dec to 更
- dec to helek
- dec to indiction
- dec to kalabtun
- dec to katun
- dec to kin (Maya)
- dec to mahayuga
- dec to manvantara
- dec to piktun
- dec to triennium
- dec to tun (Maya)
- dec to vighati
- dec to winal
Everyday comparisons
Convert to decades
Frequently asked questions
What is a decade?
A decade is a period of ten years. In everyday speech decades are named by their tens digit ("the 1990s").
How is the decade defined?
10 years.
How many days are in a decade?
One decade equals 3,652.425 days.
How many hours are in a decade?
One decade equals 87,658.2 hours.
How many minutes are in a decade?
One decade equals 5,259,492 minutes.