Metric Number names

SI Units

Really I saw it at Wikipedia and thought it was cool so I stole it and put it on my web page right here!  
SI prefixes
1000n 10n Prefix Symbol Since Short scale Long scale Decimal equivalent in SI writing style
10008 1024 yotta- Y 1991 Septillion Quadrillion 1 000 000 000 000 000 000 000 000
10007 1021 zetta- Z 1991 Sextillion Trilliard (thousand trillion) 1 000 000 000 000 000 000 000
10006 1018 exa- E 1975 Quintillion Trillion 1 000 000 000 000 000 000
10005 1015 peta- P 1975 Quadrillion Billiard(thousand billion) 1 000 000 000 000 000
10004 1012 tera- T 1960 Trillion Billion 1 000 000 000 000
10003 109 giga- G 1960 Billion Milliard (thousand million) 1 000 000 000
10002 106 mega- M 1960 Million 1 000 000
10001 103 kilo- k 1795 Thousand 1 000
10002/3 102 hecto- h 1795 Hundred 100
10001/3 101 deca- da 1795 Ten 10
10000 100 (none) (none) NA One 1
10001/3 10-1 deci- d 1795 Tenth 0.1
10002/3 10-2 centi- c 1795 Hundredth 0.01
1000-1 10-3 milli- m 1795 Thousandth 0.001
1000-2 10-6 micro- µ 1960 Millionth 0.000 001
1000-3 10-9 nano- n 1960 Billionth Milliardth 0.000 000 001
1000-4 10-12 pico- p 1960 Trillionth Billionth 0.000 000 000 001
1000-5 10-15 femto- f 1964 Quadrillionth Billiardth 0.000 000 000 000 001
1000-6 10-18 atto- a 1964 Quintillionth Trillionth 0.000 000 000 000 000 001
1000-7 10-21 zepto- z 1991 Sextillionth Trilliardth 0.000 000 000 000 000 000 001
1000-8 10-24 yocto- y 1991 Septillionth Quadrillionth 0.000 000 000 000 000 000 000 001

The names in yellow are the OLD names. Prior to 1960 a trillion was called a billion. You could use that to win a few bar bets.


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