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Unit Length, Duration and SizeNotes Other
xentojiffy (physics) 3 × 10-52s 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 × 10−49s The amount of time light takes to travel one fermi (about the size of a nucleon) in a vacuum.
zeptojiffy (physics) 3 × 10−46s 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 × 10−43s The amount of time light takes to travel one fermi (about the size of a nucleon) in a vacuum.
femtojiffy (physics) 3 × 10−40s The amount of time light takes to travel one fermi (about the size of a nucleon) in a vacuum.
picojiffy (physics) 3 × 10−37s The amount of time light takes to travel one fermi (about the size of a nucleon) in a vacuum.
nanojiffy (physics) 3 × 10−34s The amount of time light takes to travel one fermi (about the size of a nucleon) in a vacuum.
myriojiffy (physics) 3 × 10−31s The amount of time light takes to travel one fermi (about the size of a nucleon) in a vacuum.
millijiffy (physics) 3 × 10−29s The amount of time light takes to travel one fermi (about the size of a nucleon) in a vacuum.
xentojiffy (electronics) 1/6 × 1028 s to 1/5 × 1028 s Used to measure the time between alternating power cycles. Also a casual term for a short period of time
millijiffy (physics) 3 × 10−28s 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 × 10−27s 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 1025 s to 1/5 x 1025 s Used to measure the time between alternating power cycles. Also a casual term for a short period of time
decijiffy (physics) 3 × 10−25s 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 × 10−24s The amount of time light takes to travel one fermi (about the size of a nucleon) in a vacuum.
dekajiffy (physics) 3 × 10−23s 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 1022 s to 1/5 x 1022 s Used to measure the time between alternating power cycles. Also a casual term for a short period of time
hectojiffy (physics) 3 × 10−22s 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 × 10-21s
kilojiffy (physics) 3 × 10−21s 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 1019 s to 1/5 x 1019 s Used to measure the time between alternating power cycles. Also a casual term for a short period of time
yoctoweek 6.048 x 10-19 s
attosecond 10−18 s shortest time now measurable
yoctomonth 2.62974 × 10-18s
megajiffy (physics) 3 × 10−18s 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 1016 s to 1/5 x 1016 s Used to measure the time between alternating power cycles. Also a casual term for a short period of time
zeptoweek 6.048 x 10-16 s
femtosecond 10−15 s pulse time on fastest lasers
zeptomonth 2.62974 × 10-15s
gigajiffy (physics) 3 × 10−15s 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 1013 s to 1/5 x 1013 s Used to measure the time between alternating power cycles. Also a casual term for a short period of time
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 × 10-12s
terajiffy (physics) 3 × 10−12s 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 1010 s to 1/5 x 1010 s Used to measure the time between alternating power cycles. Also a casual term for a short period of time
femtoweek 6.048 x 10-10 s
nanosecond 10−9 s time for molecules to fluoresce
femtomonth 2.62974 × 10-9s
petajiffy (physics) 3 × 10−9s 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 107 s to 1/5 x 107 s Used to measure the time between alternating power cycles. Also a casual term for a short period of time
picoweek 6.048 x 10-7 s
microsecond 10−6 s
picomonth 2.62974 × 10-6s
exajiffy (physics) 3 × 10-6s 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 Used to measure the time between alternating power cycles. Also a casual term for a short period of time
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 Used to measure the time between alternating power cycles. Also a casual term for a short period of time
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 Used to measure the time between alternating power cycles. Also a casual term for a short period of time
microhour 0.0036 s3 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 Used to measure the time between alternating power cycles. Also a casual term for a short period of time
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 Used to measure the time between alternating power cycles. Also a casual term for a short period of time
bijiffy (electronics) 1/30 s to 1/25 s Used to measure the time between alternating power cycles. Also a casual term for a short period of time
trijiffy (electronics) 1/20 s to 1/10 s Used to measure the time between alternating power cycles. Also a casual term for a short period of time
quadjiffy (electronics) 4/60 s to 4/50 s Used to measure the time between alternating power cycles. Also a casual term for a short period of time
quintjiffy(electronics) 5/60 s to 5/50 s Used to measure the time between alternating power cycles. Also a casual term for a short period of time
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 Used to measure the time between alternating power cycles. Also a casual term for a short period of time
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 Used to measure the time between alternating power cycles. Also a casual term for a short period of time
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 Used to measure the time between alternating power cycles. Also a casual term for a short period of time
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 Used to measure the time between alternating power cycles. Also a casual term for a short period of time 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 hours4 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 days30.4368 days
deciannum 1.2 months or 36.5 days 1 month, 5–8 days, and 12 hours
kilohour 1,000 hours1 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
dekamonth 10 months
novemquadraweek 49 weeks was mentioned in metric time
duodekamonth 12 months
year 12 months or 365 days
common year 365 days52 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 monthsAbout 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 monthsAbout 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 monthsAbout 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 monthsAbout 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 monthsAbout 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 monthsAbout 83,000,000,000,000 years and 4 months
exahour 1 quintillion hours About 1.1412 x 1014 years
petaaannum 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 monthsAbout 83 quadrillion years and 4 months
zettahour 1 sextillion hours About 1.1412 x 1017 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 monthsAbout 83 quintillion years and 4 months
yottahour 1 septillion hours About 1.1412 x 1020 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 monthsAbout 83 sextillion years and 4 months
xennahour 1 octillion hours About 1.1412 x 1023 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 monthsAbout 83 septillion years and 4 months
dakahour 1 nonillion hours About 1.1412 x 1026 years
xennannum 1 octillion years
dakaday 1 nonillion days About 2.737918 octillion years
dakaweek 7 nonillion days
dakamonth 1 nonillion monthsAbout 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

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

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