Unit of time

measurement unit for time

A unit of time or midst unit is any particular time interval, used as a standard way of measuring or expressing duration. The base unit of time in the International System of Units (SI) and by extension most of the Western world, is the second, defined as about 9 billion oscillations of the caesium atom.

Table showing quantitative relationships between common units of time

Note: The light-year is not a unit of time, but a unit of length of about 9.5 petametres (9 454 254 955 488 kilometers).

ListEdit

Units of time
Unit Length, Duration and Size Notes
icososecond 10−60 s One novemdecillionth of a second. The smallest unit of time.
icosominute 10−60 m One novemdecillionth of a minute or 60 icososeconds.
ennecosecond 10−57 s One octodecillionth of a second.
icosohour 10−60 h One novemdecillionth of an hour or 3,600 icososeconds.
ennecominute 10−57 m One octodecillionth of a minute or 60 ennecoseconds.
icosoday 10−60 d One novemdecillionth of a day or 24 icosohours.
icosoweek 10−60 w One novemdecillionth of a week or seven icosodays.
octecosecond 10−54 s One septendecillionth of a second.
icosofortnight 10−60 fn One novemdecillionth of a fortnight or two icosoweeks.
icosomonth 10−60 m One novemdecillionth of a month or 2.628 octecoseconds.
ennecohour 10−57 h One octodecillionth of an hour or 3,600 ennecoseconds.
icosoquarter 10−60 q One novemdecillionth of a quarter or 7.884 octecoseconds.
icosoannum 10−60 yr One novemdecillionth of a year or 31.536 octecoseconds. Also called "icosoyear".
octecominute 10−54 m One septendecillionth of a minute or 60 octecoseconds.
ennecoday 10−57 d One octodecillionth of a day or 24 ennecohours.
ennecoweek 10−57 w One octodecillionth of a week or seven ennecodays.
heptecosecond 10−51 s One sexdecillionth of a second.
ennecofortnight 10−57 fn One octodecillionth of a fortnight or two ennecoweeks.
ennecomonth 10−57 m One octodecillionth of a month or 2.628 heptecoseconds.
octecohour 10−54 h One septendecillionth of an hour or 3,600 octecoseconds.
ennecoquarter 10−57 q One octodecillionth of a quarter or 7.884 heptecoseconds.
ennecoannum 10−57 yr One octodecillionth of a year or 31.536 heptecoseconds. Also called "ennecoyear".
heptecominute 10−51 m One sexdecillionth of a minute or 60 heptecoseconds.
octecoday 10−54 d One septendecillionth of a day or 24 octecohours.
octecoweek 10−54 w One septendecillionth of a week or seven octecodays.
hexecosecond 10−48 s One quindecillionth of a second.
octecofortnight 10−54 fn One septendecillionth of a fortnight or two octecoweeks.
octecomonth 10−54 m One septendecillionth of a month or 2.628 hexecoseconds.
heptecohour 10−51 h One sexdecillionth of an hour or 3,600 heptecoseconds.
octecoquarter 10−54 q One septendecillionth of a quarter or 7.884 hexecoseconds.
octecoannum 10−54 yr One septendecillionth of a year or 31.536 hexecoseconds. Also called "octecoyear".
hexecominute 10−48 m One quindecillionth of a minute or 60 hexecoseconds.
heptecoday 10−51 d One sexdecillionth of a day or 24 heptecohours.
heptecoweek 10−51 w One sexdecillionth of a week or seven heptecodays.
pentecosecond 10−45 s One quattuordecillionth of a second.
heptecofortnight 10−51 fn One sexdecillionth of a fortnight or two heptecoweeks.
heptecomonth 10−51 m One sexdecillionth of a month or 2.628 pentecoseconds.
hexecohour 10−48 h One quindecillionth of an hour or 3,600 hexecoseconds.
heptecoquarter 10−51 q One sexdecillionth of a quarter or 7.884 pentecoseconds.
heptecoannum 10−51 yr One sexdecillionth of a year or 31.536 pentecoseconds. Also called "heptecoyear".
Planck time 5.39×10−44 s The amount of time light takes to travel one Planck length.
pentecominute 10−45 m One quattuordecillionth of a minute or 60 pentecoseconds.
hexecoday 10−48 d One quindecillionth of a day or 24 hexecohours.
hexecoweek 10−48 w One quindecillionth of a week or seven hexecodays.
tetrecosecond 10−42 s One tredecillionth of a second.
hexecofortnight 10−48 fn One quindecillionth of a fortnight or two hexecoweeks.
hexecomonth 10−48 m One quindecillionth of a month or 2.628 tetrecoseconds.
pentecohour 10−45 h One quattuordecillionth of an hour or 3,600 pentecoseconds.
hexecoquarter 10−48 q One quindecillionth of a quarter or 7.884 tetrecoseconds.
hexecoannum 10−48 yr One quindecillionth of a year or 31.536 tetrecoseconds. Also called "hexecoyear".
tetrecominute 10−42 m One tredecillionth of a minute or 60 tetrecoseconds.
pentecoday 10−45 d One quattuordecillionth of a day or 24 pentecohours.
pentecoweek 10−45 w One quattuordecillionth of a week or seven pentecodays.
trecosecond 10−39 s One duodecillionth of a second.
pentecofortnight 10−45 fn One quattuordecillionth of a fortnight or two pentecoweeks.
pentecomonth 10−45 m One quattuordecillionth of a month or 2.628 trecoseconds.
tetrecohour 10−42 h One tredecillionth of an hour or 3,600 tetrecoseconds.
pentecoquarter 10−45 q One quattuordecillionth of a quarter or 7.884 trecoseconds.
pentecoannum 10−45 yr One quattuordecillionth of a year or 31.536 trecoseconds. Also called "pentecoyear".
trecominute 10−39 m One duodecillionth of a minute or 60 trecoseconds.
tetrecoday 10−42 d One tredecillionth of a day or 24 tetrecohours.
tetrecoweek 10−42 w One tredecillionth of a week or seven tetrecodays.
duecosecond 10−36 s One undecillionth of a second.
tetrecofortnight 10−42 fn One tredecillionth of a fortnight or two tetrecoweeks.
tetrecomonth 10−42 m One tredecillionth of a month or 2.628 duecoseconds.
trecohour 10−39 h One duodecillionth of an hour or 3,600 trecoseconds.
tetrecoquarter 10−42 q One tredecillionth of a quarter or 7.884 duecoseconds.
tetrecoannum 10−42 yr One tredecillionth of a year or 31.536 duecoseconds. Also called "tetrecoyear".
duecominute 10−36 m One undecillionth of a minute or 60 duecoseconds.
trecoday 10−39 d One duodecillionth of a day or 24 trecohours.
trecoweek 10−39 w One duodecillionth of a week or seven trecodays.
mecosecond 10−33 s One decillionth of a second.
trecofortnight 10−39 fn One duodecillionth of a fortnight or two trecoweeks.
trecomonth 10−39 m One duodecillionth of a month or 2.628 mecoseconds.
duecohour 10−36 h One undecillionth of an hour or 3,600 duecoseconds.
trecoannum 10−39 yr One duodecillionth of a year or 31.536 mecoseconds. Also called "trecoyear".
mecominute 10−33 m One decillionth of a minute or 60 mecoseconds.
duecoday 10−36 d One undecillionth of a day or 24 duecohours.
duecoweek 10−36 w One undecillionth of a week or seven duecodays.
vecosecond 10−30 s One nonillionth of a second.
duecofortnight 10−36 fn One undecillionth of a fortnight or two duecoweeks.
duecomonth 10−36 m One undecillionth of a month or 2.628 vecoseconds.
mecohour 10−33 h One decillionth of an hour or 3,600 mecoseconds.
duecoquarter 10−36 q One undecillionth of a quarter or 7.884 duecoseconds.
duecoannum 10−36 yr One undecillionth of a year or 31.536 vecoseconds. Also called "duecoyear".
vecominute 10−30 m One nonillionth of a minute or 60 vecoseconds.
mecoday 10−33 d One decillionth of a day or 24 mecohours.
mecoweek 10−33 w One decillionth of a week or seven mecodays.
xonosecond 10−27 s One octillionth of a second.
mecofortnight 10−33 fn One decillionth of a fortnight or two mecoweeks.
mecomonth 10−33 m One decillionth of a month or 2.628 xonoseconds.
vecohour 10−30 h One nonillionth of an hour or 3,600 vecoseconds.
mecoquarter 10−33 q One decillionth of a quarter or 7.884 mecoseconds.
mecoannum 10−33 yr One decillionth of a year or 31.536 xonoseconds. Also called "mecoyear".
xonominute 10−27 m One octillionth of a minute or 60 xonoseconds.
vecoday 10−30 d One nonillionth of a day or 24 vecohours.
vecoweek 10−30 w One nonillionth of a week or seven vecodays.
yoctosecond 10−24 s One septillionth of a second.
vecofortnight 10−30 fn One nonillionth of a fortnight or two vecoweeks.
vecomonth 10−30 m One nonillionth of a month or 2.628 yoctoseconds.
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.
xonohour 10−27 h One octillionth of an hour or 3,600 xonoseconds.
vecoquarter 10−30 q One nonillionth of a quarter or 7.884 vecoseconds.
vecoannum 10−30 yr One nonillionth of a year or 31.536 yoctoseconds. Also called "vecoyear".
yoctominute 10−24 m One septillionth of a minute or 60 yoctoseconds.
xonoday 10−27 d One octillionth of a day or 24 xonohours.
xonoweek 10−27 w One octillionth of a week or seven xonodays.
zeptosecond 10−21 s One sextillionth of a second. Time measurement scale of the NIST strontium atomic clock. Smallest fragment of time currently measurable is 247 zeptoseconds.[1]
xonofortnight 10−27 fn One octillionth of a fortnight or two xonoweeks.
xonomonth 10−27 m One octillionth of a month or 2.628 zeptoseconds.
yoctohour 10−24 h One septillionth of an hour or 3,600 yoctoseconds.
xonoquarter 10−27 q One octillionth of a quarter or 7.884 xonoseconds.
xonoannum 10−27 yr One octillionth of a year or 31.536 zeptoseconds. Also called "xonoyear".
zeptominute 10−21 m One sextillionth of a minute or 60 zeptoseconds.
yoctoday 10−24 d One septillionth of a day or 24 yoctohours.
yoctoweek 10−24 w One septillionth of a week or seven yoctodays.
attosecond 10−18 s One quintillionth of a second.
yoctofortnight 10−24 fn One septillionth of a fortnight or two yoctoweeks.
yoctomonth 10−24 m One septillionth of a month or 2.628 attoseconds.
zeptohour 10−21 h One sextillionth of an hour or 3,600 zeptoseconds.
yoctoquarter 10−24 q One septillionth of a quarter or 7.884 yoctoseconds.
yoctoannum 10−24 yr One septillionth of a year or 31.536 attoseconds. Also called "yoctoyear".
attominute 10−18 m One quintillionth of a minute or 60 attoseconds.
zeptoday 10−21 d One sextillionth of a day or 24 zeptohours.
zeptoweek 10−21 w One sextillionth of a week or seven zeptodays.
femtosecond 10−15 s One quadrillionth of a second. Pulse time on fastest lasers.
zeptofortnight 10−21 fn One sextillionth of a fortnight or two zeptoweeks.
zeptomonth 10−21 m One sextillionth of a month or 2.628 femtoseconds.
attohour 10−18 h One quintillionth of an hour or 3,600 attoseconds.
zeptoquarter 10−21 q One sextillionth of a quarter or 7.884 femtoseconds.
zeptoannum 10−21 yr One sextillionth of a year or 31.536 femtoseconds. Also called "zeptoyear".
femtominute 10−15 m One quadrillionth of a minute or 60 femtoseconds.
attoday 10−18 d One quintillionth of a day or 24 attohours.
attoweek 10−18 w One quintillionth of a week or seven attodays.
svedberg 10−13 s Time unit used for sedimentation rates (usually of proteins).
picosecond 10−12 s One trillionth of a second.
attofortnight 10−18 fn One quintillionth of a fortnight or two attoweeks.
attomonth 10−18 m One quintillionth of a month or 2.628 picoseconds.
femtohour 10−15 h One quadrillionth of an hour or 3,600 femtoseconds.
attoquarter 10−18 q One quintillionth of a quarter or 7.884 picoseconds.
attoannum 10−18 yr One quintillionth of a year or 31.536 picoseconds. Also called "attoyear".
picominute 10−12 m One trillionth of a minute or 60 picoseconds.
femtoday 10−15 d One quadrillionth of a day or 24 femtohours.
femtoweek 10−15 w One quadrillionth of a week or seven femtodays.
nanosecond 10−9 s One billionth of a second. Time for molecules to fluoresce.
femtofortnight 10−15 fn One quadrillionth of a fortnight or two femtoweeks.
femtomonth 10−15 m One quadrillionth of a month or 2.628 nanoseconds.
picohour 10−12 h One trillionth of an hour or 3,600 picoseconds.
femtoquarter 10−15 q One quadrillionth of a quarter or 7.884 nanoseconds.
shake 10−8 s 10 nanoseconds, also a casual term for a short period of time.
femtoannum 10−15 yr One quadrillionth of a year or 31.536 nanoseconds. Also called "femtoyear".
nanominute 10−9 m One billionth of a minute or 60 nanoseconds.
picoday 10−12 d One trillionth of a day or 24 picohours.
picoweek 10−12 w One trillionth of a week or seven picodays.
microsecond 10−6 s One millionth of a second. Symbol is µs
picofortnight 10−12 fn One trillionth of a fortnight or two picoweeks.
picomonth 10−12 m One trillionth of a month or 2.628 microseconds.
nanohour 10−9 h One billionth of an hour or 3,600 nanoseconds.
picoquarter 10−9 q One billionth of a quarter or 7.884 microseconds.
centimillisecond 10−5 s One hundred thousandth of a second or one hundredth of a millisecond.
picoannum 10−12 yr One trillionth of a year or 31.536 microseconds. Also called "picoyear".
microminute 10−6 m One millionth of a minute or 60 microseconds.
nanoday 10−9 d One billionth of a day or 24 nanohours.
nanoweek 10−9 w One billionth of a week or seven nanodays.
decimillisecond 10−4 s One ten-thousandth of a second or one tenth of a millisecond.
millisecond 10−3 s One thousandth of a second. Shortest time unit used on stopwatches.
nanofortnight 10−9 fn One billionth of a fortnight or two nanoweeks.
nanomonth 10−9 m One billionth of a month or 2.628 milliseconds.
microhour 10−6 h One millionth of an hour or 3,600 microseconds.
centimilliminute 10−5 m One hundred thousandth of a minute or 600 microseconds.
decimilliminute 10−4 m One ten-thousandth of a minute or 6 milliseconds.
nanoquarter 10−9 q One billionth of a quarter or 7.884 milliseconds.
centisecond 10−2 s One hundredth of a second.
jiffy (electronics) 1/60 s or 1/50 s Used to measure the time between alternating power cycles. Also a casual term for a short period of time.
nanoannum 10−9 yr One billionth of a year or 31.536 milliseconds. Also called "nanoyear".
centimillihour 10−5 h One hundred thousandth of an hour or 36 milliseconds.
milliminute 10−3 m One thousandth of a minute or 60 milliseconds.
microday 10−6 d One millionth of a day or 24 microhours.
decisecond 10−1 s One tenth of a second.
quadrisecond / semisemisecond / quarter second 0.25 s One quarter of a second or 250 milliseconds.
decimillihour 10−4 h One ten-thousandth of an hour or 360 milliseconds.
semisecond / half second 0.5 s One half of a second or 500 milliseconds.
centiminute 10−2 m One hundredth of a minute or 600 milliseconds.
microweek 10−6 w One millionth of a week or seven microdays.
centimilliday 10−5 d One hundred thousandth of a day or 864 milliseconds.
second s SI Base unit.
microfortnight 10−6 fn One millionth of a fortnight or two microweeks.
micromonth 10−6 m One millionth of a month or 2.628 seconds.
millihour 10−3 h One thousandth of an hour or 3.6 seconds.
deciminute 10−1 m One tenth of a minute or six seconds.
centimilliweek 10−5 w One hundred thousandth of a week or 70 microdays.
microquarter 10−6 q One millionth of a quarter or 7.884 seconds.
decimilliday 10−4 d One ten-thousandth of a day or 8.64 seconds.
decasecond 10 s
centimillifortnight 10−5 fn One hundred thousandth of a fortnight or two centimilliweeks.
centimillimonth 10−5 m One hundred thousandth of a month or 26.28 seconds.
microannum 10−6 yr One millionth of a year or 31.536 seconds. Also called "microyear".
centihour 10−2 h One hundredth of an hour or 36 seconds.
minute 60 s
decimilliweek 10−4 w One ten-thousandth of a week or 700 microdays.
centimilliquarter 10−5 q One hundred thousandth of a quarter or 78.84 seconds.
milliday 10−3 d Also marketed as a ".beat" by the Swatch corporation; Milliday is a more accurate name.
moment 1/40 solar hour (90 s on average) Medieval unit of time used by astronomers to compute astronomical movements, length varies with the season.[2]
hectosecond 100 s 1 minute and 40 seconds.
decimillifortnight 10−4 fn One ten-thousandth of a fortnight or two decimilliweeks.
decimillimonth 10−4 m One ten-thousandth of a month or 262.8 seconds.
centimilliannum 10−5 yr One hundred thousandth of a year or 315.36 seconds. Also called "centimilliyear".
decihour 10−1 h One tenth of an hour or six minutes or 360 seconds.
decaminute 10 m Ten minutes or 600 seconds.
milliweek 10−3 w One thousandth of a week or seven millidays.
decimilliquarter 10−4 q One ten-thousandth of a quarter or 788.4 seconds.
ke 10−2 s 14 minutes and 24 seconds. Also called "centiday".
kilosecond 1000 s 16 minutes and 40 seconds.
millifortnight 10−3 fn One thousandth of a fortnight or two milliweeks.
millimonth 10−3 m One thousandth of a month or 2,628 seconds.
decimilliannum 10−4 yr One ten-thousandth of a year or 3,153.6 seconds. Also called "decimilliyear".
hour 60 min
hectominute 100 m 100 minutes or 6,000 seconds.
centiweek 10−2 w One hundredth of a week or 70 millidays.
milliquarter 10−3 q One thousandth of a quarter or 7,884 seconds.
deciday 10−1 d One tenth of a day or 2.4 hours.
decakilosecond 104 s Ten thousand seconds or ten kiloseconds.
centifortnight 10−2 fn One hundredth of a fortnight or two centiweeks.
centimonth 10−2 m One hundredth of a month or 26,280 seconds.
milliannum 10−3 yr One thousandth of a year or 31,536 seconds. Also called "milliyear".
decahour 10 h Ten hours or 600 minutes or 36,000 seconds.
kilominute 1000 m 1,000 minutes or 60,000 seconds.
deciweek 10−1 w One tenth of a week or 700 millidays.
centiquarter 10−2 q One hundredth of a quarter or 78,840 seconds.
day 24 h Longest unit used on stopwatches and countdowns.
hectokilosecond 105 s One hundred thousand seconds or one hundred kiloseconds.
decifortnight 10−1 fn One tenth of a fortnight or two deciweeks.
decimonth 10−1 m One tenth of a month or 262,800 seconds.
centiannum 10−2 yr One hundredth of a year or 315,360 seconds. Also called "centiyear".
hectohour 100 h 100 hours or 6,000 minutes or 360,000 seconds.
decakilominute 104 m 10,000 minutes or 600,000 seconds.
deciquarter 10−1 q One tenth of a quarter or 788,400 seconds.
week d Also called "sennight".
decaday 10 d Ten days or 240 hours.
megasecond 106 s 277.777778333333 hours or about 1 week and 4.6 days.
fortnight weeks 14 days.
lunar month 27 d h 48 min – 29 d 12 h Various definitions of lunar month exist.
month 28-31 days Occasionally calculated as 30 days.
deciannum 10−1 yr One tenth of a year or 3,153,600 seconds. Also called "deciyear".
kilohour 1000 h 1,000 hours or 60,000 minutes or 3,600,000 seconds.
hectokilominute 105 m 100,000 minutes or 6,000,000 seconds.
decaweek 10 w Ten weeks or 70 days.
quarter and season mo
hectoday 100 d 100 days or 2,400 hours.
quadrimester mo
semester 18 weeks A division of the academic year.[3] Literally "six months", also used in this sense.
decafortnight 10 fn Ten fortnights or 20 weeks.
half year mo
decamonth 10 m Ten months or 26,280,000 seconds.
lunar year 354.37 days
year 12 mo 365 or 366 d. Also called "annum".
common year 365 d 52 weeks and 1 day.
tropical year 365 d h 48 min 45.216 s[4] Average.
Gregorian year 365 d h 49 min 12 s Average.
sidereal year 365 d h min 9.7635456 s
leap year 366 d 52 weeks and d
decakilohour 104 h About 416.666666 days.
megaminute 106 m About 694.444444 days.
hectoweek 100 w 100 weeks or 700 days.
biennium yr
decaquarter 10 q Ten quarters or 30 months.
kiloday 1000 d About 2.739726 years.
triennium yr
hectofortnight 100 fn 100 fortnights or 200 weeks.
quadrennium yr
olympiad yr
lustrum yr
hectomonth 100 m About 8.333333 years.
decade 10 yr Also called "decayear" or "decaannum".
hectokilohour 105 h About 11.415525 years.
indiction 15 yr
kiloweek 1000 w About 19.178082 years.
hectoquarter 100 q About 25 years.
decakiloday 104 d About 27.39726 years.
gigasecond 109 s 16,666,666.6667 minutes or about 31.7 years.
kilofortnight 1000 fn About 38.356164 years.
jubilee 50 yr
kilomonth 1000 m About 83.333333 years.
century 100 yr Also called "hectoyear" or "hectoannum".
megahour 106 h About 114.155251 years.
decakiloweek 104 w About 191.78082 years.
kiloquarter 1000 q About 250 years.
hectokiloday 105 d About 273.9726 years.
decakilofortnight 104 fn About 383.56164 years.
decakilomonth 104 m About 833.33333 years.
millennium 1000 yr Also called "kiloyear" or "kiloannum".
gigaminute 109 m About 1,902.587519 years.
hectokiloweek 105 w About 1,917.8082 years.
decakiloquarter 104 q About 2,500 years.
megaday 106 d About 2,739.726 years.
hectokilofortnight 105 fn About 3,835.6164 years.
hectokilomonth 105 m About 8,333.3333 years.
decakiloannum 104 yr Ten thousand years or ten millenniums. Also called "decakiloyear".
megaweek 106 w About 19,178.082 years.
hectokiloquarter 105 q About 25,000 years.
terasecond 1012 s About 31,709 years.
megafortnight 106 fn About 38,356.164 years.
megamonth 106 m About 83,333.333 years.
hectokiloannum 105 yr One hundred thousand years or one hundred millenniums. Also called "hectokiloyear".
gigahour 109 h About 114,155.251 years.
megaquarter 106 q About 250,000 years.
megaannum 106 yr Also called "megayear" 1,000 millennia (plural of millennium), or 1 million years.
teraminute 1012 m About 1,902,587.519 years.
gigaday 109 d About 2,739,726 years.
gigaweek 109 w About 19,178,082 years.
petasecond 1015 s About 31,709,791 years.
gigafortnight 109 fn About 38,356,164 years.
gigamonth 109 m About 83,333,333 years.
terahour 1012 h About 114,155,251 years.
galactic year 2.3×108 yr The amount of time it takes the Solar System to orbit the center of the Milky Way Galaxy one time. Around 230,000,000 years.
gigaquarter 109 q About 250,000,000 years.
cosmological decade varies 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.
gigaannum 109 yr Also refers to an indefinite period of time, otherwise is 1,000,000,000 years. Also called "gigayear".
petaminute 1012 m About 1,902,587,519 years.
teraday 1012 d About 2,739,726,000 years.
teraweek 1012 w About 19,178,082,000 years.
exasecond 1018 s About 31,709,791,983 years.
terafortnight 1012 fn About 38,356,164,000 years.
teramonth 1012 m About 83,333,333,000 years.
petahour 1015 h About 114,155,251,000 years.
teraquarter 1012 q About 250,000,000,000 years.
teraannum 1012 yr About 1,000,000,000,000 years. Also called "terayear".
examinute 1018 m About 1,902,587,519,000 years.
petaday 1015 d About 2,739,726,000,000 years.
petaweek 1015 w About 1.917808E+13 years.
zettasecond 1021 s About 31,709,791,983,764 years.
petafortnight 1015 fn About 3.835616E+13 years.
petamonth 1015 m About 8.333333E+13 years.
exahour 1018 h About 114,155,251,000,000 years.
petaquarter 1015 q About 2.5E+14 years.
petaannum 1015 yr About 1,000,000,000,000,000 years. Also called "petayear".
zettaminute 1021 m About 1.902587E+15 years.
exaday 1018 d About 2.739726E+15 years.
exaweek 1018 w About 1.917808E+16 years.
yottasecond 1024 s About 31,709,791,983,764,584 years.
exafortnight 1018 fn About 3.835616E+16 years.
examonth 1018 m About 8.333333E+16 years.
zettahour 1021 h About 1.141552E+17 years.
exaquarter 1018 q About 2.5E+17 years.
exaannum 1018 yr About 1,000,000,000,000,000,000 years. Also called "exayear".
yottaminute 1024 m About 1.902587E+18 years.
zettaday 1021 d About 2.739726E+18 years.
zettaweek 1021 w About 1.917808E+19 years.
xennasecond 1027 s About 3.1709791983765E+19 years.
zettafortnight 1021 fn About 3.835616E+19 years.
zettamonth 1021 m About 8.333333E+19 years.
yottahour 1024 h About 1.141552E+20 years.
zettaquarter 1021 q About 2.5E+20 years.
zettaannum 1021 yr About 1E+21 years. Also called "zettayear".
xennaminute 1027 m About 1.902587E+21 years.
yottaday 1024 d About 2.739726E+21 years.
yottaweek 1024 w About 1.917808E+22 years.
dakasecond 1030 s About 3.1709791983765E+22 years.
yottafortnight 1024 fn About 3.835616E+22 years.
yottamonth 1024 m About 8.333333E+22 years.
xennahour 1027 h About 1.141552E+23 years.
yottaquarter 1024 q About 2.5E+23 years.
yottaannum 1024 yr About 1E+24 years. Also called "yottayear".
dakaminute 1030 m About 1.902587E+24 years.
xennaday 1027 d About 2.739726E+24 years.
xennaweek 1027 w About 1.917808E+25 years.
hendasecond 1033 s About 3.1709791983765E+25 years.
xennafortnight 1027 fn About 3.835616E+25 years.
xennamonth 1027 m About 8.333333E+25 years.
dakahour 1030 h About 1.141552E+26 years.
xennaquarter 1027 q About 2.5E+26 years.
xennaannum 1027 yr About 1E+27 years. Also called "xennayear".
hendaminute 1033 m About 1.902587E+27 years.
dakaday 1030 d About 2.739726E+27 years.
dakaweek 1030 w About 1.917808E+28 years.
dokasecond 1036 s About 3.1709791983765E+28 years.
dakafortnight 1030 fn About 3.835616E+28 years.
dakamonth 1030 m About 8.333333E+28 years.
hendahour 1033 h About 1.141552E+29 years.
dakaquarter 1030 q About 2.5E+29 years.
dakaannum 1030 yr About 1E+30 years. Also called "dakayear".
dokaminute 1036 m About 1.902587E+30 years.
hendaday 1033 d About 2.739726E+30 years.
hendaweek 1033 w About 1.917808E+31 years.
tradakasecond 1039 s About 3.1709791983765E+31 years.
hendafortnight 1033 fn About 3.835616E+31 years.
hendamonth 1033 m About 8.333333E+31 years.
dokahour 1036 h About 1.141552E+32 years.
hendaquarter 1033 q About 2.5E+32 years.
hendaannum 1033 yr About 1E+33 years. Also called "hendayear".
tradakaminute 1039 m About 1.902587E+33 years.
dokaday 1036 d About 2.739726E+33 years.
dokaweek 1036 w About 1.917808E+34 years.
tedakasecond 1042 s About 3.1709791983765E+34 years.
dokafortnight 1036 fn About 3.835616E+34 years.
dokamonth 1036 m About 8.333333E+34 years.
tradakahour 1039 h About 1.141552E+35 years.
dokaquarter 1036 q About 2.5E+35 years.
dokaannum 1036 yr About 1E+36 years. Also called "dokayear".
tedakaminute 1042 m About 1.902587E+36 years.
tradakaday 1039 d About 2.739726E+36 years.
tradakaweek 1039 w About 1.917808E+37 years.
pedakasecond 1045 s About 3.1709791983765E+37 years.
tradakafortnight 1039 fn About 3.835616E+37 years.
tradakamonth 1039 m About 8.333333E+37 years.
tedakahour 1042 h About 1.141552E+38 years.
tradakaquarter 1039 q About 2.5E+38 years.
tradakaannum 1039 yr About 1E+39 years. Also called "tradakayear".
pedakaminute 1045 m About 1.902587E+39 years.
tedakaday 1042 d About 2.739726E+39 years.
tedakaweek 1042 w About 1.917808E+40 years.
exdakasecond 1048 s About 3.1709791983765E+40 years.
tedakafortnight 1042 fn About 3.835616E+40 years.
tedakamonth 1042 m About 8.333333E+40 years.
pedakahour 1045 h About 1.141552E+41 years.
tedakaquarter 1042 q About 2.5E+41 years.
tedakaannum 1042 yr About 1E+42 years. Also called "tedakayear".
exdakaminute 1048 m About 1.902587E+42 years.
pedakaday 1045 d About 2.739726E+42 years.
pedakaweek 1045 w About 1.917808E+43 years.
zedakasecond 1051 s About 3.1709791983765E+43 years.
pedakafortnight 1045 fn About 3.835616E+43 years.
pedakamonth 1045 m About 8.333333E+43 years.
exdakahour 1048 h About 1.141552E+44 years.
pedakaquarter 1045 q About 2.5E+44 years.
pedakaannum 1045 yr About 1E+45 years. Also called "pedakayear".
zedakaminute 1051 m About 1.902587E+45 years.
exdakaday 1048 d About 2.739726E+45 years.
exdakaweek 1048 w About 1.917808E+46 years.
yodakasecond 1054 s About 3.1709791983765E+46 years.
exdakafortnight 1048 fn About 3.835616E+46 years.
exdakamonth 1048 m About 8.333333E+46 years.
zedakahour 1051 h About 1.141552E+47 years.
exdakaquarter 1048 q About 2.5E+47 years.
exdakaannum 1048 yr About 1E+48 years. Also called "exdakayear".
yodakaminute 1054 m About 1.902587E+48 years.
zedakaday 1051 d About 2.739726E+48 years.
zedakaweek 1051 w About 1.917808E+49 years.
nedakasecond 1057 s About 3.1709791983765E+49 years.
zedakafortnight 1051 fn About 3.835616E+49 years.
zedakamonth 1051 m About 8.333333E+49 years.
yodakahour 1054 h About 1.141552E+50 years.
zedakaquarter 1051 q About 2.5E+50 years.
zedakaannum 1051 yr About 1E+51 years. Also called "zedakayear".
nedakaminute 1057 m About 1.902587E+51 years.
yodakaday 1054 d About 2.739726E+51 years.
yodakaweek 1054 w About 1.917808E+52 years.
ikasecond 1060 s About 3.1709791983765E+52 years.
yodakafortnight 1054 fn About 3.835616E+52 years.
yodakamonth 1054 m About 8.333333E+52 years.
nedakahour 1057 h About 1.141552E+53 years.
yodakaquarter 1054 q About 2.5E+53 years.
yodakaannum 1054 yr About 1E+54 years. Also called "yodakayear".
ikaminute 1060 m About 1.902587E+54 years.
nedakaday 1057 d About 2.739726E+54 years.
nedakaweek 1057 w About 1.917808E+55 years.
nedakafortnight 1057 fn About 3.835616E+55 years.
nedakamonth 1057 m About 8.333333E+55 years.
ikahour 1060 h About 1.141552E+56 years.
nedakaquarter 1057 q About 2.5E+56 years.
nedakaannum 1057 yr About 1E+57 years. Also called "nedakayear".
ikaday 1060 d About 2.739726E+57 years.
ikaweek 1060 w About 1.917808E+58 years.
ikafortnight 1060 fn About 3.835616E+58 years.
ikamonth 1060 m About 8.333333E+58 years.
ikaquarter 1060 q About 2.5E+59 years.
ikaannum 1060 yr About 1E+60 years. Also called "ikayear". The biggest unit of time.

ReferencesEdit

  1. "Meet the zeptosecond, the shortest unit of time ever measured". Retrieved 2020-10-17.
  2. Milham, Willis I. (1945). Time and Timekeepers. New York: MacMillan. p. 190. ISBN 0-7808-0008-7.
  3. "Semester". Webster's Dictionary. Retrieved 3 December 2014.
  4. McCarthy, Dennis D.; Seidelmann, P. Kenneth (2009). Time: from Earth rotation to atomic physics. Wiley-VCH. p. 18. ISBN 978-3-527-40780-4., Extract of page 18

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