## ListEdit

Unit | Length, Duration and Size | Notes | Other | |
---|---|---|---|---|

xentojiffy (physics) | 3 × 10^{-52}s | The amount of time light takes to travel one fermi (about the size of a nucleon) in a vacuum. This is the shortest time unit possible to understand in physics. All smaller time units have no use in physics. | ||

yoctojiffy (physics) | 3 × 10^{−49}s | The amount of time light takes to travel one fermi (about the size of a nucleon) in a vacuum. | ||

zeptojiffy (physics) | 3 × 10^{−46}s | The amount of time light takes to travel one fermi (about the size of a nucleon) in a vacuum. | ||

Planck time unit | 5.39 × 10^{–44} s | The amount of time light takes to travel one Planck length. | ||

attojiffy (physics) | 3 × 10^{−43}s | The amount of time light takes to travel one fermi (about the size of a nucleon) in a vacuum. | ||

femtojiffy (physics) | 3 × 10^{−40}s | The amount of time light takes to travel one fermi (about the size of a nucleon) in a vacuum. | ||

picojiffy (physics) | 3 × 10^{−37}s | The amount of time light takes to travel one fermi (about the size of a nucleon) in a vacuum. | ||

nanojiffy (physics) | 3 × 10^{−34}s | The amount of time light takes to travel one fermi (about the size of a nucleon) in a vacuum. | ||

myriojiffy (physics) | 3 × 10^{−31}s | The amount of time light takes to travel one fermi (about the size of a nucleon) in a vacuum. | ||

millijiffy (physics) | 3 × 10^{−29}s | The amount of time light takes to travel one fermi (about the size of a nucleon) in a vacuum. | ||

xentojiffy (electronics) | 1/6 × 10^{28} s to 1/5 × 10^{28} s | Used to measure the time between alternating power cycles. Also a casual term for a short period of time | ||

millijiffy (physics) | 3 × 10^{−28}s | The amount of time light takes to travel one fermi (about the size of a nucleon) in a vacuum. | ||

xentosecond | 10^{−27} s | |||

centijiffy (physics) | 3 × 10^{−27}s | The amount of time light takes to travel one fermi (about the size of a nucleon) in a vacuum. | ||

xentominute | 6 x 10^{−26} s | |||

yoctojiffy (electronics) | 1/6 x 10^{25} s to 1/5 x 10^{25} s | Used to measure the time between alternating power cycles. Also a casual term for a short period of time | ||

decijiffy (physics) | 3 × 10^{−25}s | The amount of time light takes to travel one fermi (about the size of a nucleon) in a vacuum. | ||

yoctosecond | 10^{−24} s | |||

jiffy (physics) | 3 × 10^{−24}s | The amount of time light takes to travel one fermi (about the size of a nucleon) in a vacuum. | ||

dekajiffy (physics) | 3 × 10^{−23}s | The amount of time light takes to travel one fermi (about the size of a nucleon) in a vacuum. | ||

xentohour | 3.6 x 10^{−24} s | |||

yoctominute | 6 x 10^{−23} s | |||

xentoday | 8.64 x 10^{-23} s | |||

zeptojiffy (electronics) | 1/6 x 10^{22} s to 1/5 x 10^{22} s | Used to measure the time between alternating power cycles. Also a casual term for a short period of time | ||

hectojiffy (physics) | 3 × 10^{−22}s | The amount of time light takes to travel one fermi (about the size of a nucleon) in a vacuum. | ||

xentoweek | 6.048 x 10^{-22} s | |||

zeptosecond | 10^{−21} s | |||

xentomonth | 2.62974 × 10^{-21}s | |||

kilojiffy (physics) | 3 × 10^{−21}s | The amount of time light takes to travel one fermi (about the size of a nucleon) in a vacuum. | ||

yoctohour | 3.6 x 10^{−21} s | |||

xentoannum | 10^{-27} years | 31.5569 zeptoseconds | ||

zeptominute | 6 x 10^{−20} s | |||

yoctoday | 8.64 x 10^{-20} s | |||

attojiffy (electronics) | 1/6 x 10^{19} s to 1/5 x 10^{19} s | |||

yoctoweek | 6.048 x 10^{-19} s | |||

attosecond | 10^{−18} s | shortest time now measurable | ||

yoctomonth | 2.62974 × 10^{-18}s | |||

megajiffy (physics) | 3 × 10^{−18}s | The amount of time light takes to travel one fermi (about the size of a nucleon) in a vacuum. | ||

zeptohour | 3.6 x 10^{−18} s | |||

yoctoannum | 10^{-24} years | 31.5569 attoseconds | ||

attominute | 6 x 10^{−17} s | |||

zeptoday | 8.64 x 10^{-17} s | |||

femtojiffy (electronics) | 1/6 x 10^{16} s to 1/5 x 10^{16} s | |||

zeptoweek | 6.048 x 10^{-16} s | |||

femtosecond | 10^{−15} s | pulse time on fastest lasers | ||

zeptomonth | 2.62974 × 10^{-15}s | |||

gigajiffy (physics) | 3 × 10^{−15}s | The amount of time light takes to travel one fermi (about the size of a nucleon) in a vacuum. | ||

attohour | 3.6 x 10^{−15} s | |||

zeptoannum | 10^{-21} years | 31.5569 femtoseconds | ||

femtominute | 6 x 10^{−14} s | |||

attoday | 8.64 x 10^{-14} s | |||

picojiffy (electronics) | 1/6 x 10^{13} s to 1/5 x 10^{13} s | |||

svedberg | 1 x 10^{-13 }s
| Time unit used for sedimentation rates (usually of proteins). | ||

attoweek | 6.048 x 10^{-13} s | |||

picosecond | 10^{−12} s | |||

attomonth | 2.62974 × 10^{-12}s | |||

terajiffy (physics) | 3 × 10^{−12}s | The amount of time light takes to travel one fermi (about the size of a nucleon) in a vacuum. | ||

femtohour | 3.6 x 10^{−12} s | |||

attoannum | 10^{-18} years | 31.5569 picoseconds | ||

picominute | 6 x 10^{−11} s | |||

femtoday | 8.64 x 10^{-11} s | |||

nanojiffy (electronics) | 1/6 x 10^{10} s to 1/5 x 10^{10} s | |||

femtoweek | 6.048 x 10^{-10} s | |||

nanosecond | 10^{−9} s | time for molecules to fluoresce | ||

femtomonth | 2.62974 × 10^{-9}s | |||

petajiffy (physics) | 3 × 10^{−9}s | The amount of time light takes to travel one fermi (about the size of a nucleon) in a vacuum. | ||

picohour | 3.6 x 10^{−9} s | |||

femtoannum | 10^{-15} years | 31.5569 nanoseconds | ||

shake | 10^{-8} s | Also a casual term for a short period of time | 10 nanoseconds | |

nanominute | 6 x 10^{−8} s | |||

picoday | 8.64 x 10^{-8} s | |||

microjiffy (electronics) | 1/6 x 10^{7} s to 1/5 x 10^{7} s | |||

picoweek | 6.048 x 10^{-7} s | |||

microsecond | 10^{−6} s | |||

picomonth | 2.62974 × 10^{-6}s | |||

exajiffy (physics) | 3 × 10^{-6}s | The amount of time light takes to travel one fermi (about the size of a nucleon) in a vacuum. | ||

nanohour | 3.6 x 10^{−6} s | |||

fifth | 4.63 x 10^{-6 }s
| medieval unit of time | ||

picoannum | 10^{-12} years | 31.5569 microseconds | ||

myriojiffy (electronics) | 1/600000 s to 1/500000 s | |||

microminute | 6 x 10^{−5} s | |||

nanoday | 8.64 x 10^{-5} s | |||

myriosecond | 0.0001 s | shortest time unit used on stopwatches | ||

millijiffy (electronics) | 1/60000 s to 1/50000 s | |||

fourth | 1/3,600 second | medieval unit of time | ||

nanoweek | 6.048 x 10^{-4} s | |||

millisecond | 0.001 s | shortest time unit used on stopwatches | ||

nanomonth | 0.00262974 s | |||

zettajiffy (physics) | 0.003 s | The amount of time light takes to travel one fermi (about the size of a nucleon) in a vacuum. | ||

myriominute | 0.006 s | |||

centijiffy (electronics) | 1/6000 s to 1/5000 s | |||

microhour | 0.0036 s | 3 milliseconds and 6 microseconds | ||

centisecond | 0.01 s | used on some stopwatches | ||

dwink | 0.0185 s | commonly found on the internet | ||

decijiffy (electronics) | 1/600 s to 1/500 s | |||

third | 1/60 s | medieval unit of time | ||

nanoannum | 10^{-9} years | 31.5569 milliseconds | ||

milliminute | 0.06 s | |||

microday | 0.0864 seconds | |||

decisecond | 0.1 s | used on some stopwatches | ||

jiffy (electronics) | 1/60 s to 1/50 s | |||

bijiffy (electronics) | 1/30 s to 1/25 s | |||

trijiffy (electronics) | 1/20 s to 1/10 s | |||

quadjiffy (electronics) | 4/60 s to 4/50 s | |||

quintjiffy(electronics) | 5/60 s to 5/50 s | |||

wink | 0.222 seconds | commonly found on the internet | ||

myriohour | 0.36 seconds | |||

semisecond | 0.5 seconds | |||

centiminute | 0.6 s | |||

microweek | 0.6048 s | |||

second | 1 sec | SI base unit | ||

dekajiffy (electronics) | 1/6 s to 1/5 s | |||

bisecond | 2 seconds | |||

micromonth | 2.62974 s | |||

trisecond | 3 seconds | |||

millihour | 3.6 seconds | |||

quadrasecond | 4 seconds | |||

quintsecond | 5 seconds | |||

deciminute | 6 seconds | |||

instant | 8 seconds | commonly found on the internet | ||

myrioday | 8.64 seconds | |||

nonasecond | 9 seconds | |||

dekasecond | 10 seconds | |||

hectojiffy (electronics) | 10/6 s to 2 s | |||

vigintisecond | 20 seconds | |||

trigintisecond | 30 seconds | |||

microannum | 10^{-6} years | 31.5569 seconds | ||

centihour | 36 seconds | |||

quadragintisecond | 40 seconds | |||

quinquagintisecond | 50 seconds | |||

minute | 60 seconds | |||

septagintisecond | 70 seconds | |||

myrioweek | 1.008 minutes | |||

milliday | 86.4 seconds | About 1 minute and 26.4 seconds | ||

moment | 90 seconds | medieval unit of time | ||

hectosecond | 100 seconds | 1 minute and 40 seconds | ||

myriomonth | 0.0001 months | |||

biminute | 2 minutes | |||

kilojiffy (electronics) | 100/6 s to 20 s | |||

triminute | 3 minutes | |||

duhectosecond | 200 seconds | 3 minutes and 20 seconds | ||

quadraminute | 4 minutes | |||

quintminute | 5 minutes | |||

decihour | 6 minutes | |||

octminute | 8 minutes | |||

dekaminute | 10 minutes | |||

milliweek | 10.08 minutes | |||

ke | 14 minutes and 24 seconds | Also called centiday
| ||

tide | 15 minutes | |||

kilosecond | 1,000 seconds | 16 minutes and 40 seconds | ||

period | 40 minutes | commonly used in elementary schools. Also a term to describe time. | ||

millimonth | 0.001 months | |||

myrioannum | 0.0001 years | |||

hour | 60 minutes | |||

hectominute | 100 minutes | 1 hour and 40 minutes | ||

centiweek | 1.68 hours | 1 hour and 48 minutes | ||

deciday | 2.4 hours | 2 hours and 24 minutes | ||

myriasecond | 10,000 seconds | |||

nune | 3.5 hours | commonly found on the internet | ||

megajiffy (electronics) | 100000/6 s to 20000 s | 4.62963 hours | ||

sexahour | 6 hours | |||

centimonth | 0.01 months | 7.3048439814815 hours | ||

milliannum | 0.001 years | 8.76581 hours | ||

dekahour | 10 hours | 10 hours | ||

demiday | 12 hours | |||

kilominute | 1,000 minutes | 16 hours and 40 minutes | ||

deciweek | 16.8 hours | 16 hours and 48 minutes | ||

day | 24 hours | longest unit used on stopwatches and countdowns | 1 day or 24 hours | |

biday | 2 days | |||

triday | 3 days | |||

decimonth | 0.1 months | 3.04368 days | ||

centiannum | 0.01 years | 3.65242 days | ||

quadraday | 4 days | |||

hectohour | 100 hours | 4 days and 4 hours | ||

pentaday | 5 days | |||

myriaminute | 10,000 minutes | |||

week | 7 days | Also called sennight
| ||

dekaday | 10 days | 10 days | ||

megasecond | 1,000,000 seconds | About 11.6 days | ||

fortnight | 2 weeks | 14 days | may not be common | |

lunar month | 27 Days 4 hours 48 minutes–29 days 12 hours | Various definitions of lunar month exist.
| ||

quadraweek | 28 days | |||

month | 28–31 days | 30.4368 days | ||

deciannum | 1.2 months or 36.5 days | 1 month, 5–8 days, and 12 hours | ||

kilohour | 1,000 hours | 1 month, 13–16 days, and 16 hours | ||

dekaweek | 70 days | |||

quarter and season | 3 months | It is called season if it is based on TV or weather temperature, otherwise it is called quarter | ||

hectoday | 100 days | 3 months and 8–11 days | ||

decafortnight | 140 days | 4 months and 20 days (assuming 30 days per month) | ||

dekamonth | 10 months | |||

novemquadraweek | 49 weeks | was mentioned in metric time | ||

duodekamonth | 12 months | |||

year | 12 months or 365 days | |||

common year | 365 days | 52 weeks + 1 day | ||

tropical year | 365 days 5:48:45.216 hours^{[1]} | average | ||

Gregorian year | 365 days 5:49:12 hours^{[2]} | average | ||

sidereal year | 365 days 6:09:09.7635456 hours | |||

leap year | 366 days | 52 weeks + 2 days | ||

myriahour | 10,000 hours | |||

hectoweek | 700 days | |||

tricosamonth | 23 months | |||

biennium | 2 years | A unit of time commonly used by legislatures | ||

megaminute | 1,000,000 minutes | About 696 days | ||

kiloday | 1,000 days | 2 years, 8 months, 27 days the other | ||

triennium | 3 years | |||

quadrennium | 4 years | |||

lustrum | 5 years | |||

sexennium | 6 years | |||

septennium | 7 years | |||

octennium | 8 years | |||

hectomonth | 100 months | About 8 years and 4 months | ||

novennium | 9 years | |||

decade | 10 years | |||

Indiction | 15 years | |||

generation | 17-35 years | |||

kiloweek | 7,000 days | |||

score | 20 years | |||

myriaday | 10,000 days | |||

gigasecond | 1,000,000,000 seconds | About 31.7 years | ||

jubilee | 50 years | |||

kilomonth | 1,000 months | About 83 years and 4 months | ||

century | 100 years | |||

megahour | 1,000,000 hours | About 114.12 years | ||

bicentennium | 200 years | |||

tricentenium | 300 years | |||

myriaweek | 70,000 days | |||

myriamonth | 10,000 months | |||

millennium | 1,000 years | also called "kiloannum" | ||

gigaminute | 1,000,000,000 minutes | About 1,902 years | ||

megaday | 1,000,000 days | About 2,737.918 years | ||

myriaannum | 10,000 years | |||

megaweek | 7,000,000 days | |||

terasecond | 1 trillion seconds | About 31,700 years | ||

megamonth | 1,000,000 months | About 83,000 years and 4 months | ||

gigahour | 1,000,000,000 hours | About 114,120 years | ||

age and megaannum | 1,000,000 years | |||

teraminute | 1 trillion minutes | About 1,902,000 years | ||

gigaday | 1,000,000,000 days | About 2,737,918 years | ||

epoch | 10,000,000 years | |||

gigaweek | 7,000,000,000 days | |||

petasecond | 1 quadrillion seconds | About 3.17 epochs | ||

gigamonth | 1,000,000,000 months | About 83,000,000 years and 4 months | ||

era | 100,000,000 years | |||

terahour | 1 trillion hours | About 114,120,000 years | ||

galactic year | Approximately 2.3 eras^{[3]} | The amount of time it takes the Solar System to orbit the center of the Milky Way Galaxy one time. | ||

eon | 500,000,000 years | Also "An indefinite and very long period of time""^{[4]}
| ||

gigaannum | 1,000,000,000 years | |||

petaminute | 1 quadrillion minutes | About 1,902,000,000 years | ||

teraday | 1,000,000,000,000 days | About 2,737,918,000 years | ||

teraweek | 7 trillion days | |||

exasecond | 1 quintillion seconds | roughly 31.7 billion years, more than twice the age of the universe on current estimates | ||

teramonth | 1,000,000,000,000 months | About 83,000,000,000 years and 4 months | ||

petahour | 1 quadrillion hours | About 114,120,000,000 years | ||

teraannum | 1 trillion years | |||

examinute | 1 quintillion minutes | About 1.902 trillion years | ||

petaday | 1 quadrillion days | About 2,737,918,000,000 years | ||

petaweek | 7 quadrillion days | |||

zettasecond | 1 sextillion seconds | About 31.7 trillion years | ||

petamonth | 1 quadrillion months | About 83,000,000,000,000 years and 4 months | ||

exahour | 1 quintillion hours | About 1.1412 x 10^{14} years
| ||

petaannum | 1 quadrillion years | |||

zettaminute | 1 sextillion minutes | About 1.902 quadrillion years | ||

exaday | 1 quintillion days | About 2.737918 quadrillion years | ||

exaweek | 7 quintillion days | |||

yottasecond | 1 septillion seconds | About 31.7 quadrillion years | ||

examonth | 1 quintillion months | About 83 quadrillion years and 4 months | ||

zettahour | 1 sextillion hours | About 1.1412 x 10^{17} years
| ||

exaannum | 1 quintillion years | |||

yottaminute | 1 septillion minutes | About 1.902 quintillion years | ||

zettaday | 1 sextillion days | About 2.737918 quintillion years | ||

zettaweek | 7 sextillion days | |||

xennasecond | 1 octillion seconds | About 31.7 quintillion years | ||

zettamonth | 1 sextillion months | About 83 quintillion years and 4 months | ||

yottahour | 1 septillion hours | About 1.1412 x 10^{20} years
| ||

zettaannum | 1 sextillion years | |||

xennaminute | 1 octillion minutes | About 1.902 sextillion years | ||

yottaday | 1 septillion days | About 2.737918 sextillion years | ||

yottaweek | 7 septillion days | |||

dakasecond | 1 nonillion seconds | About 31.7 sextillion years | ||

yottamonth | 1 septillion months | About 83 sextillion years and 4 months | ||

xennahour | 1 octillion hours | About 1.1412 x 10^{23} years
| ||

yottaannum | 1 septillion years | |||

dakaminute | 1 nonillion minutes | About 1.902 septillion years | ||

xennaaday | 1 octillion days | About 2.737918 septillion years | ||

xennaweek | 7 octillion days | |||

xennamonth | 1 octillion months | About 83 septillion years and 4 months | ||

dakahour | 1 nonillion hours | About 1.1412 x 10^{26} years
| ||

xennannum | 1 octillion years | |||

dakaday | 1 nonillion days | About 2.737918 octillion years | ||

dakaweek | 7 nonillion days | |||

dakamonth | 1 nonillion months | About 83 octillion years and 4 months | ||

dakaannum | 1 nonillion years | |||

cosmological decade | 10 nonillion years | 10 times the length of the previous cosmological decade, with CÐ 1 beginning either 10 seconds or 10 years after the Big Bang, depending on the definition. This is the longest time unit possible to understand in physics. All longer time units have no use in physics. | ||

stoum | 100 nonillion years | |||

storm | 2 stoums | |||

eind | 10 stoums | |||

end | 100 stoums |

## ReferencesEdit

- ↑ Template:Cite book, Extract of page 18
- ↑ Template:Cite book, Extract of page 287
- ↑ http://starchild.gsfc.nasa.gov/docs/StarChild/questions/question18.html NASA - StarChild Question of the Month for February 2000
- ↑ http://www.merriam-webster.com/dictionary/aeon?show=0&t=1372548060