Yocto Yocto

Yocto - Definition and Overview

Yocto (symbol y) is a SI prefix in the SI system of units denoting a factor of 10-24.

Adopted in 1991, it comes from the Greek όχτώ, meaning eight, because it is equal to 1/10008.

SI prefixes
10n Prefix Symbol Short scale Long scale Name Decimal Equivalent
1024 yotta Y Septillion Quadrillion 1 000 000 000 000 000 000 000 000
1021 zetta Z Sextillion Trilliard (thousand trillion) 1 000 000 000 000 000 000 000
1018 exa E Quintillion Trillion 1 000 000 000 000 000 000
1015 peta P Quadrillion Billiard (thousand billion) 1 000 000 000 000 000
1012 tera T Trillion Billion 1 000 000 000 000
109 giga G Billion Milliard (thousand million) 1 000 000 000
106 mega M Million 1 000 000
103 kilo k Thousand 1 000
102 hecto h Hundred 100
101 deca, deka da Ten 10
10−1 deci d Tenth 0.1
10−2 centi c Hundredth 0.01
10−3 milli m Thousandth 0.001
10−6 micro ยต Millionth 0.000 001
10−9 nano n Billionth Milliardth 0.000 000 001
10−12 pico p Trillionth Billionth 0.000 000 000 001
10−15 femto f Quadrillionth Billiardth 0.000 000 000 000 001
10−18 atto a Quintillionth Trillionth 0.000 000 000 000 000 001
10−21 zepto z Sextillionth Trilliardth 0.000 000 000 000 000 000 001
10−24 yocto y Septillionth Quadrillionth 0.000 000 000 000 000 000 000 001
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See also

Example Usage of Yocto
StephaniePride: @sciencebase Ha yes! I was pondering the timescale till yotta & zetta r the common units of storage & zepto & Yocto common units of analysis
tweetybir: Making problem using extreme metric prefixes: zepto- (z, 10-21); Yocto- (y, 10-24); zetta- (Z, 1021); yotta- (Y, 1024).
sciencebase: @LeighJKBoerner Don't forget yotta at the other end of the scale (10^24) to Yocto - http://www.sciencebase.com/Yocto.html
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