Power of ten 
Decimal value 
Name 
Smaller than 10^{−36} 

10^{36} 

10^{33}
10^{30}
10^{27}
10^{24}
10^{21}
10^{18}
10^{15} 10^{12}

10^{9}

0.000 000 001 


Lottery: The odds of winning the Grand Prize (matching all 6 numbers) in the US Powerball Multistate Lottery, with a single ticket, under the rules as at 2003, are 120,526,770 to 1 against, for a probability of 8 × 10^{9}.

Lottery: The odds of winning the Jackpot (matching the 6 main numbers) in the UK National Lottery, with a single ticket, under the rules as at 2003, are 13,983,816 to 1 against, for a probability of 7 × 10^{8}.

10^{6}

0.000 001 
one millionth 

Poker: The odds of being dealt a royal flush in poker are 649,739 to 1 against, for a probability of 1.5 × 10^{6}

Poker: The odds of being dealt a straight flush (other than a royal flush) in poker are 72,192 to 1 against, for a probability of 1.4 × 10^{5}

Poker: The odds of being dealt a four of a kind in poker are 4,164 to 1 against, for a probability of 2.4 × 10^{4}

Poker: The odds of being dealt a full house in poker are 693 to 1 against, for a probability of 1.4 × 10^{3}

10^{3}

0.001 
one thousandth 

Poker: The odds of being dealt a flush in poker are 508 to 1 against, for a probability of 1.9 × 10^{3}

Poker: The odds of being dealt a straight in poker are 254 to 1 against, for a probability of 4 × 10^{3}
 α = 0.007 297 352 533(27), the fine structure constant

10^{2}

0.01

one hundredth


HIV: About 1.2% of all 1549 yearold humans were infected with HIV at the end of 2001

Lottery: The odds of winning any prize in the UK National Lottery, with a single ticket, under the rules as at 2003, are 54 to 1 against, for a probability of about 0.018 (1.8%)

Poker: The odds of being dealt a three of a kind in poker are 46 to 1 against, for a probability of 0.021 (2.1%)

Lottery: The odds of winning any prize in the US Powerball Multistate Lottery, with a single ticket, under the rules as at 2003, are 36.06 to 1 against, for a probability of 0.028 (2.8%)

Poker: The odds of being dealt two pair in poker are 20 to 1 against, for a probability of 0.048 (4.8%).

10^{1}

0.1

one tenth


Poker: The odds of being dealt only one pair in poker are about 4 to 3 against (1.37 to 1), for a probability of 0.42 (42%).

Poker: The odds of being dealt no pair in poker are nearly 1 to 2, for a probability of about 0.5 (50%)

10^{0}

1

one


10^{1}

10

ten

 there are 10 fingers on a pair of human hands
 In Olympic basketball, the roster limit for a team is 12 (and they are limited to wearing numbers 4 through 15).
 there are 26 letters in the Latin alphabet
 In NCAA basketball, players are not to wear digits above 5, and they are limited to one or two digits, making 42 distinct combinations (although 01, 02, 03, 04, and 05 typically aren't used). Since the roster limit is typically around 12, this doesn't present that much of a problem.

10^{2}

100

hundred

 In North American professional sports, players typically wear uniform numbers from 1 to 99. In some sports, 0 and 00 are also allowed, making 101 different combinations.
 there are 128 characters in the ASCII character set
 there were 191 member states of the United Nations as of 2003

10^{3}

1 000

thousand

 20003000 letters on a typical typed page of text
 the DNA of the simplest viruses has some 5000 base pairs.

10^{4}

10 000

ten thousand

 Each neuron in the human brain is estimated to connect to 10,000 others
 There are 20,000  40,000 distinct Chinese characters, depending on how you count them
 Each human being is estimated to have 30,000 to 40,000 genes
 As of July 2004, the largest number of decimal places of π that have been recited from memory  > 42000

10^{5}

100 000 
one hundred thousand 

10^{6}

1 000 000

1 million (both short scale and long scale)


Geographic places: The NIMA GEOnet Names Server contains approximately 3.88 million named geographical features outside the United States, with 5.34 million names. The USGS Geographic Names Information System claims to have almost 2 million physical and cultural geographic features within the United States.

Species: The World Resources Institute claims that approximately 1.4 million species have been named, out of an unknown number of total species (estimates range between 2 and 100 million species).

Chess: There are 2 279 184 solutions to nQueens Problem for n = 15

Playing cards: There are 2 598 960 different 5card poker hands that can be dealt from a standard 52card deck.
 Web sites: as of July 2003, the Netcraft web survey estimates that there are 42 million distinct web sites

Books: The British Library claims that it holds over 150 million items. The Library of Congress claims that it holds approximately 119 million items. See Gutenberg galaxy


10^{9}

1 000 000 000

1 billion (short scale), 1 milliard (long scale)

 Cataloged stars: The Guide Star Catalog II has entries on 998,402,801 distinct astronomical objects

Computational limit of a 32bit CPU: 2 147 483 647 is equal to 2^{31}1, and as such is the largest number which can fit into a signed (two's complement) 32bit integer on a computer, thus marking the upper computational limit of a 32bit CPU such as Intel's Pentiumclass computer chips.

Base pairs in the genome: approximately 3×10^{9} base pairs in the human genome

Web pages: approximately 3 × 10^{9} web pages indexed by Google as of 2003

Living human beings: approximately 6.3×10^{9} human beings living as of mid 2003

Observable galaxies: between 1×10^{10} and 8×10^{10} galaxies in the observable (as of 2003) Universe

Neurons in the brain: approximately 10^{11} neurons in the human brain

Stars in our Galaxy: approximately 4 × 10^{11} stars in the Milky Way galaxy

10^{12}

1 000 000 000 000

1 trillion (short scale), 1 billion (long scale)


Known digits of pi: As of 2002, the number of known digits of pi was 1 241 100 000 000

Cells in the human body: the human body consists of roughly 10^{14} cells

10^{15}

1 000 000 000 000 000

1 quadrillion (short scale), 1 billiard (long scale)


Bacteria in the human body: there are roughly 10^{15} bacteria in the human body
 Grains of sand: all the world's beaches put together hold roughly 2 × 10^{15} grains of sand

10^{18}

1 000 000 000 000 000 000

1 quintillion (short scale), 1 trillion (long scale)

 Insects: It has been estimated that the insect population of the Earth comprises roughly 10^{18} insects.

Rubik's Cube: There are 4.3 × 10^{19} different positions of a Rubik's Cube

10^{21}


1 sextillion (short scale), 1 trilliard (long scale)


10^{24}


1 septillion (short scale), 1 quadrillion (long scale)



10^{27} 

1 octillion (short scale), 1 quadrilliard (long scale)


Atoms in the human body: the average human body contains roughly 7×10^{27} atoms, see [2]

10^{30} 

1 nonillion (short scale), 1 quintillion (long scale)


10^{33} 

1 decillion (short scale), 1 quintilliard (long scale)



10^{36} 




Larger 


 The EddingtonDirac number is roughly 10^{40}.
 About 10^{47} molecules of water on Earth
 Earth consists of roughly 10^{50} atoms

Fundamental particles in the observable universe: various sources estimate the total number of fundamental particles in the observable universe in the range 10^{80} to 10^{85}. However, these estimates are best regarded as guesswork.
 10^{100} , a googol
 10^{7,235,733}, order of magnitude of largest known prime number, as of May 2004. The exact value of that record prime is 2^{24036583}  1. Proving prime numbers with a thousand to several tens of thousands of decimal digits, depending on special form, can be done in minutes on modern computers.
 10^{80,000,000,000,000,000}, largest named number in Archimedes' Sand Reckoner
 10^{googol} (), a googolplex

, order of magnitude of an upper bound that occurred in a proof of Skewes
 , order of magnitude of another upper bound in a proof of Skewes
 ...
Note: To correctly interpret the last few entries, keep in mind that (for example):
