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Calculations: order of magnitudes
Table of metric prefixes - all powers

Fill in the appropriate line the known value
Attention: Do not re-enter the exact number of an answer.
 • small number • 1 pico p: 10−12 = 0.000 000 000 001 10 pico: 100 pico: 1000 pico = 1 nano n: 10−9 = 0.000 000 001 10 nano: 100 nano: 1000 nano = 1 micro µ: 10−6 = 0.000 001 10 micro: 100 micro: 1000 micro = 1 milli m: 10−3 = 0.001 10 milli = 1 centi c: 10−2 = 0.01 10 centi = 1 deci d: 10−1 = 0.1 • • • basic unit 1: 100 = 1 = reference 1 deka (deca) da: 101 = 10 10 deka = 1 hecto h: 102 = 100 10 hecto = 1 kilo k: 103 = 1,000 10 kilo: 100 kilo: 1000 kilo = 1 mega M: 106 = 1,000,000 10 mega: 100 mega: 1000 Mega = 1 giga G: 109 = 1,000,000,000 10 giga: 100 giga: • large number •  1 tera T: 1012 = 1,000,000,000,000

SI prefixes
Symbol Y Z E P T G M k h da - d c m µ n p f a z y
Factor 1024 1021 1018 1015 1012 109 106 103 102 101  1  10-1 10-2 10-3 10-6 10-9 10-12 10-15 10-18 10-21 10-24

Prefixes for decimal multiples of metric units and parts of units

 Factor in full in words SI prefix SI symbol 1.0E+24 1.0E+21 1.0E+18 1.0E+15 1.0E+12 1.0E+9 1.0E+6 1.0E+3 1.0E+2 1.0E+1 1.0E 0 1.0E−1 1.0E−2 1.0E−3 1.0E−6 1.0E−9 1.0E−12 1.0E−15 1.0E−18 1.0E−21 1.0E−24 large  1 000 000 000 000 000 000 000 000            1 000 000 000 000 000 000 000            1 000 000 000 000 000 000            1 000 000 000 000 000            1 000 000 000 000            1 000 000 000            1 000 000            1 000            100            10 ref.     1            0.1            0.01            0.001            0.000 001            0.000 000 001            0.000 000 000 001            0.000 000 000 000 001            0.000 000 000 000 000 001            0.000 000 000 000 000 000 001 small 0.000 000 000 000 000 000 000 001 septillion sextillion quintillion quadrillion trillion billion million thousand hundred ten initial value tenth hundredth thousandth millionth billionth trillionth quadrillionth quintillionth sextillionth septillionth yotta zetta exa peta tera giga mega kilo hecto deka one deci centi milli micro nano pico femto atto zepto yocto Y Z E P T G M k h da - d c m µ n p f a z y

Exponent (basis 10) of decimals: E n = 10n

 Factor European name American name 103 thousand thousand 106 million million 109 milliard billion • • 1012 billion • • trillion • • • 1015 billiard quadrillion • • • • 1018 trillion • • • quintillion • • • • • 1021 trilliard sextillion 1024 quadrillion • • • • septillion 1027 quadrilliard octillion 1030 quintillion • • • • • nonillion 1033 - decillion 1036 sextillion undecillion 1039 - duodecillion 1042 septillion tredecillion 1045 - quattuordecillion 1048 octillion quindecillion 1051 - sextdecillion 1054 nonillion septendecillion 1057 - octodecillion 1060 decillion novemdecillion 1063 - nonillionvigintillion

 Number Name 10100 googol 10too many googolplex

Though generally speaking, a googol is just a term that means "A very big number"
and a googolplex is just a term that means "An unimaginably large number".

Some more conversions

Binary multiples of units
(Standardized in IEC 60027-2. Is not part of the SI metric system of units)

 code name meaning value Ki Kibi binary Kilo 210 = 1 024 ≈ 1,02 k Mi Mebi binary Mega 220 = 1 048 576 ≈ 1,05 M Gi Gibi binary Giga 230 = 1 073 741 824 ≈ 1,07 G Ti Tebi binary Tera 240 = 1 099 511 627 776 ≈ 1,10 T Pi Pebi binary Peta 250 = 1 125 899 906 842 624 ≈ 1,13 P Ei Exbi binary Exa 260 = 1 152 921 504 606 846 976 ≈ 1,15 E Zi Zebi binary Zetta 270 = 1 180 591 620 717 411 303 424 ≈ 1,18 Z Yi Yobi binary Yotta 280 = 1 208 925 819 614 629 174 706 176 ≈ 1,21 Y