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Yotta is the largest decimal unit prefix in the metric system, denoting a factor of 1024 or 1000000000000000000000000. It has the unit symbol Y. The prefix name is derived from the Ancient Greek οκτώ ([októ] Error: {{Lang}}: text has italic markup (help)), meaning "eight", because it is equal to 1,0008. It was added as an SI prefix to the International System of Units (SI) in 1991.[1]

Usage examples:

  • The mass of the Earth is 5,972.6 Yg.[2]
  • The mass of the oceans is about 1.4 Yg.[3]
  • The total power output of the Sun is approximately 385 YW.[4]
  • The observable universe is estimated to be 880 Ym in diameter.[5]
  • One yottabyte (YB) is a unit of digital information or information storage capacity that contains one septillion bytes or 1,000 zettabytes. The yobibyte (YiB) is a related unit that uses a binary prefix, and means 1,0248 bytes, which is approximately 1.2 septillion bytes.
SI prefixes
Prefix Base 10 Decimal Adoption
[nb 1]
Name Symbol
quetta Q 1030 1000000000000000000000000000000 2022[6]
ronna R 1027 1000000000000000000000000000
yotta Y 1024 1000000000000000000000000 1991
zetta Z 1021 1000000000000000000000
exa E 1018 1000000000000000000 1975[7]
peta P 1015 1000000000000000
tera T 1012 1000000000000 1960
giga G 109 1000000000
mega M 106 1000000 1873
kilo k 103 1000 1795
hecto h 102 100
deca da 101 10
— — 100 1 —
deci d 10−1 0.1 1795
centi c 10−2 0.01
milli m 10−3 0.001
micro μ 10−6 0.000001 1873
nano n 10−9 0.000000001 1960
pico p 10−12 0.000000000001
femto f 10−15 0.000000000000001 1964
atto a 10−18 0.000000000000000001
zepto z 10−21 0.000000000000000000001 1991
yocto y 10−24 0.000000000000000000000001
ronto r 10−27 0.000000000000000000000000001 2022[6]
quecto q 10−30 0.000000000000000000000000000001
Notes
  1. ^ Prefixes adopted before 1960 already existed before SI. The introduction of the CGS system was in 1873.

See also

References

  1. ^ "Resolution 4 of the 19th CGPM (Conférence Générale des Poids et Mesures)". BIPM (Bureau International des Poids et Mesures).
  2. ^ Williams, David R. "Earth fact sheet". Earth fact sheet. NASA. Retrieved 31 October 2015.
  3. ^ Kennish, Michael J. (2001). Practical handbook of marine science. Marine science series (3rd ed.). CRC Press. p. 35. ISBN 0-8493-2391-6.
  4. ^ http://www.wolframalpha.com/input/?i=+total+power+output+of+the+Sun
  5. ^ http://www.wolframalpha.com/input/?i=size+of+universe By a simple units conversion, 8.8×1023km = 8.8×1026m = 880×1024m = 880 Ym
  6. ^ a b "On the extension of the range of SI prefixes". 18 November 2022. Retrieved 5 February 2023.
  7. ^ "Metric (SI) Prefixes". NIST.
Look up yotta- in Wiktionary, the free dictionary.
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