Trivia - Metric Prefixes


SI Prefix Symbol Amount Since Notes Obsolete Bogus
10^+33 una-
10^+30 dea-
10^+27 nea-
yotta-, yota- Y 10^+24 1991 Next-to-last letter of the Latin alphabet Y -> Greek iota otta-
zetta-, zeta- Z 10^+21 1991 Last letter of the Latin alphabet Z -> Greek zeta hepa-
exa- E 10^+18 1975 18 = 6 * 3 -> six = Greek hex -> Hexa - H = exa
peta- P 10^+15 1975 15 = 5 * 3 -> five = Greek pente -> peNta - N = peta
tera- T 10^+12 1960 Greek teras = monster megamega- (MM)
giga- G 10^+9 1960 Latin gigas = giant kilomega- (kM)
mega- M 10^+6 Ή Greek megas = great
10^+5 hectokilo- (hk)
10^+4 1795 myria- (ma, my)
kilo- k 10^+3 1793 Greek khilioi = 1000
hecto- h 10^+2 1793
deca-, deka- da 10^+1 1793 dk
10^0
deci- d 10^-1 1793
centi- c 10^-2 1793
milli- m 10^-3 1793
10^-4 decimilli-, dimi- (dm)
10^-5 centimilli- (cm)
micro- ΅ 10^-6 Greek mikros = small
nano- n 10^-9 1960 Greek nanos = little old man, dwarf millimicro- (m΅)
pico- p 10^-12 1960 Spanish pico = beak, small quantity micromicro- (΅΅)
femto- f 10^-15 1964 Danish or Norwegian femten = fifteen
atto- a 10^-18 1964 Danish or Norwegian atten = eighteen
zepto- z 10^-21 1991 ento-
yocto-, yokto- y 10^-24 1991 fito-
10^-27 syto-
10^-30 tredo-
10^-33 revo-

Ή: Used c.1870; legal in France since 1919


College of Chemistry, University of California, Berkeley: Metric Prefixes

ThinkQuest: ChemistReality: Conversion Factor Table

Numericana: Final Answers by Gιrard P. Michon, Ph.D.: Measurements and Units (Click on "All metric prefixes" for Official SI Metric Prefixes)

Bureau International des Poids et Mesures (BIPM): The International System of Units (SI) prefixes

The Institute for Telecommunication Sciences (ITS): Federal Standard 1037C: International System of Units (SI)

Brighton University Resource Kit for Students - Free On-line Dictionary of Computing (Click on "P" then click on "prefix")

How Many? A Dictionary of Units of Measurement: Metric Prefixes

California Institute of Technology: Roy Williams: Etymology of Units

The San Diego Supercomputer Center (SDSC): The peta- principle by Jim Binder

Appendix C of NIST Handbook 44: Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices: General Tables of Units of Measurement

A Dictionary of Measures, Units and Conversions (See: The Prefixes of the SI)

Hallym Univ. Dept. of Physics: Metric Prefixes & Number Names

http://ourworld.compuserve.com/homepages/Old_tools/units.htm [The page cannot be found]

http://www.dlsc.dla.mil/fiigs/A010B/chart1.htm [The page cannot be displayed]

http://pages.prodigy.com/J/T/L/jtbagwell/power10t.htm [The page cannot be found]

http://www.lubrizol.com/referencelibrary/readyreference/17-CalcsConversions/SI.htm [The page cannot be found]

http://nmsmn.com/~cservin/jargon/q/quantifiers.html [The page cannot be displayed]

U.S. Metric Association (USMA), Inc. (Lots of links)

sci.math FAQ: Name of Large Numbers

University of California (Riverside) Department of Mathematics: John Baez: Notation used in the Physics FAQ and in the sci.physics newsgroups (See Large and small numbers and SI prefixes)

James Riordan, University of Minnesota: Metric Prefixes

Leslie E. Bauman, Professor of Physics, Department of Physics & Astronomy, Mississippi State University: PH2233 Helpful Information

PetaHertz: Systeme International (SI) prefixes for large and small numbers

EDR (Eksperimenterende Danske Radioamatψrer) VHF Committee: SI Prefixes

Katherine E. McDermott, Faculty Computer Consultant, Seattle Central Community College: Powers of Ten--compiled from various websites


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