Time+Unit+Conversion+Table

Time Unit Conversion Table

 * ~ fractions of a second ||~ metric name ||
 * 0,000 000 000 000 000 000 000 001 || yoctosecond [ ys ] ||
 * 0,000 000 000 000 000 000 001 || zeptosecond [ zs ] ||
 * 0,000 000 000 000 000 001 || attosecond [ as ] ||
 * 0,000 000 000 000 001 || femtosecond [ fs ] ||
 * 0,000 000 000 001 [ trillionth ] || picosecond [ ps ] ||
 * 0,000 000 001 [ billionth ] || nanosecond [ ns ] ||
 * 0,000 001 [ millionth ] || microsecond [ //µ//s ] ||
 * 0,001 [ thousandth ] || millisecond [ ms ] ||
 * 0.01 [ hundredth ] || centisecond [ cs ] ||
 * 1.0 || second [ s ] ||
 * ~ seconds to years ||~  ||
 * 60 seconds || 1 minute [ mean solar ] ||
 * 59.83617 seconds || 1 minute [ sidereal ] ||
 * 60 minutes || 1 hour ||
 * 24 hours || 1 day ||
 * 3,600 seconds || 1 hour ||
 * 86,400 seconds || 1 day [ mean solar ] ||
 * 86,164.09 seconds || 1 day [ sidereal ] ||
 * 7 days || 1 week ||
 * 168 hours || 1 week ||
 * 14 days || 1 fortnight ||
 * 28, 29, 30 or 31 days || 1 month ||
 * 365 days || 1 year ||
 * 366 days || 1 leap year ||
 * 12 months || 1 year ||
 * 31,536,000 seconds || 1 year [ calendar ] ||
 * 31,558,150 seconds || 1 year [ sidereal ] ||
 * 31,556,930 seconds || 1 year [ tropical ] ||
 * 9,460,550,000,000,000 metres || 1 light year ||
 * 299,792,458 metres per second ( m/s ) || speed of light ||
 * parsec || approx. 3.25 light years ||
 * ~ year intervals - anniversaries ||~ number of years ||
 * Biennial || 2 ||
 * Triennial || 3 ||
 * Quadrennial || 4 ||
 * Quinquennial || 5 ||
 * Hexennial || 6 ||
 * Septennial || 7 ||
 * Octennial || 8 ||
 * Novennial || 9 ||
 * Decennial || 10 ||

Time Unit Conversion Chart
Source: [] Source: [|Time Unit Converter]
 * ~ Unit ||~ Symbol ||~ Definition ||~ Conversion to SI units ||
 * atomic unit of time || au || a0/(a·c) || ~ 2.418 884 254 x 10-17 s ||
 * Callippic cycle ||  || 441 mo (hollow) + 499 mo (full) = 76 a of 365.25 d || 2.398 3776 x 109 s ||
 * century || c || 100 a (see below for definition of year length) || 100 x year ||
 * day || d || 24 h || 86400 s ||
 * day (sidereal) || d || Time needed for the Earth to rotate once around its axis, determined from successive transits of a very distant astronomical object across an observer's meridian (International Celestial Reference Frame) || ~ 86 164.1 s ||
 * decade || dec || 10 a (see below for definition of year length) || 10 x year ||
 * fortnight || fn || 2 wk || 1 209 600 s ||
 * helek ||  || 1/1 080 h || 3.3 s ||
 * Hipparchic cycle ||  || 4 Callippic cycles - 1 d || 9.593 424 x 109 s ||
 * hour || h || 60 min || 3 600 s ||
 * jiffy || j || 1/60 s || .016 s ||
 * jiffy (alternate) || ja || 1/100 s || 10 ms ||
 * ke (quarter of an hour) ||  || ¼ h = 1/96 d || 60 x 60 / 4 s = 900 s = 60 / 4 min = 15 min ||
 * ke (traditional) ||  || 1/100 d || 24 x 60 x 60 / 100 s = 864 s = 24 * 60 / 100 min = 14.4 min ||
 * lustre; lustrum ||  || 5 a of 365 d || 1.5768 x 108 s ||
 * Metonic cycle; enneadecaeteris ||  || 110 mo (hollow) + 125 mo (full) = 6940 d ~ 19 a || 5.996 16 x 108 s ||
 * millennium ||  || 1 000 a (see below for definition of year length) || 1000 x year ||
 * milliday || md || 1/1 000 d || 24 x 60 x 60 / 1 000 s = 86.4 s ||
 * minute || min || 60 s, due to leap seconds sometimes 59 s or 61 s, || 60 s ||
 * moment ||  || 90 s || 90 s ||
 * month (full) || mo || 30 d || 2 592 000 s ||
 * month (Greg. av.) || mo || Average Gregorian month = 365.2425/12 d = 30.436875 d || ~ 2.6297 x 106 s ||
 * month (hollow) || mo || 29 d || 2 505 600 s ||
 * month (synodic) || mo || Cycle time of moon phases ~ 29.530589 days (Average) || ~ 2.551 x 106 s ||
 * octaeteris ||  || 48 mo (full) + 48 mo (hollow) + 3 mo (full) = 8 a of 365.25 d = 2922 d || 2.524 608 x 108 s ||
 * Planck time ||  || (G?///c//5)½ || ~ 1.351 211 868 x 10-43 s ||
 * second || s || time of 9 192 631 770 periods of the radiation corresponding to the transition between the 2 hyperfine levels of the ground state of the caesium 133 atom at 0 K (but other seconds are sometimes used in astronomy) || (SI base unit) ||
 * shake ||  || 10-8 s || 10 ns ||
 * sigma ||  || 10-6 s || 1 µs ||
 * Sothic cycle ||  || 1 461 a of 365 d || 4.607 4096 x 1010 s ||
 * svedberg || S || 10-13 s || 100 fs ||
 * week || wk || 7 d || 604 800 s ||
 * year (Gregorian) || a, y, //or// yr || 365.2425 d average, calculated from common years (365 d) plus leap years (366 d) on most years divisible by 4. See leap year for details. || 31 556 952 s ||
 * year (Julian) || a, y, //or// yr || 365.25 d average, calculated from common years (365 d) plus one leap year (366 d) every four years || 31 557 600 s ||
 * year (sidereal) || a, y, //or// yr || time taken for Sun to return to the same position with respect to the stars of the celestial sphere || ~ 365.256 363 d ~ 31 558 149.7632 s ||
 * year (tropical) || a, y, //or// yr || Length of time it takes for the Sun to return to the same position in the cycle of seasons || ~ 365.242 190 d ~ 31 556 925 s ||
 * Where UTC is observed, the length of time units longer than 1 s may increase or decrease by 1 s if a leap second occurs during the time interval of interest. ||