Numerical Prefixes

This section explains the difference between deca and deci, peta and pico.

1000m 10n Prefix Symbol Short Scale Decimal
10008 1024 yotta- Y Septillion 1 000 000 000 000 000 000 000 000
10007 1021 zetta- Z Sextillion 1 000 000 000 000 000 000 000
10006 1018 exa- E Quintillion 1 000 000 000 000 000 000
10005 1015 peta- P Quadrillion 1 000 000 000 000 000
10004 1012 tera- T Trillion 1 000 000 000 000
10003 109 giga- G Billion 1 000 000 000
10002 106 mega- M Million 1 000 000
10001 103 kilo- k Thousand 1 000
10002/3 102 hecto- h Hundred 100
10001/3 101 deca- da Ten 10
1000 100 (none) (none) One 1
1000-1/3 10-1 deci- d Tenth 0.1
1000-2/3 10-2 centi- c Hundredth 0.01
1000-1 10-3 milli- m Thousandth 0.001
1000-2 10−6 micro- Millionth 0.000 001
1000-3 10−9 nano- n Billionth 0.000 000 001
1000-4 10−12 pico- p Trillionth 0.000 000 000 001
1000-5 10−15 femto- f Quadrillionth 0.000 000 000 000 001
1000-6 10−18 atto- a Quintillionth 0.000 000 000 000 000 001
1000-7 10−21 zepto- z Sextillionth 0.000 000 000 000 000 000 001
1000-8 10−24 yocto- y Septillionth 0.000 000 000 000 000 000 000 001

Note: Our current budget deficit is in the trillions (10004).


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