This list contains selected positive numbers in increasing order, including counts of things, dimensionless quantities and probabilities. Each number is given a name in the short scale, which is used in English-speaking countries, as well as a name in the long scale, which is used in some of the countries that do not have English as their national language.

Smaller than (one googolth)

10−100 to 10−30

10−30

(0.000 000 000 000 000 000 000 000 000 001; 1000−10; short scale: one nonillionth; long scale: one quintillionth) ISO: quecto- (q)

10−27

(0.000 000 000 000 000 000 000 000 001; 1000−9; short scale: one octillionth; long scale: one quadrilliardth) ISO: ronto- (r)

10−24

(0.000 000 000 000 000 000 000 001; 1000−8; short scale: one septillionth; long scale: one quadrillionth) ISO: yocto- (y)

10−21

(0.000 000 000 000 000 000 001; 1000−7; short scale: one sextillionth; long scale: one trilliardth) ISO: zepto- (z)

10−18

(0.000 000 000 000 000 001; 1000−6; short scale: one quintillionth; long scale: one trillionth) ISO: atto- (a)

10−15

(0.000 000 000 000 001; 1000−5; short scale: one quadrillionth; long scale: one billiardth) ISO: femto- (f)

10−12

(0.000 000 000 001; 1000−4; short scale: one trillionth; long scale: one billionth) ISO: pico- (p)

10−9

(0.000 000 001; 1000−3; short scale: one billionth; long scale: one milliardth) ISO: nano- (n)

10−6

(0.000 001; 1000−2; long and short scales: one millionth) ISO: micro- (μ)

10−3

(0.001; 1000−1; one thousandth) ISO: milli- (m)

10−2

(0.01; one hundredth) ISO: centi- (c)

10−1

(0.1; one tenth) ISO: deci- (d)

100

(1; 1|one)

101

(10; ten) ISO: deca- (da)

102

(100; hundred) ISO: hecto- (h)

103

(1 000; thousand) ISO: kilo- (k)

104

(10 000; ten thousand or a myriad)

105

(100 000; one hundred thousand or a lakh).

106

(1 000 000; 10002; long and short scales: one million) ISO: mega- (M)

107

(10 000 000; a crore; long and short scales: ten million)

108

(100 000 000; long and short scales: one hundred million)

109

(1 000 000 000; 10003; short scale: one billion; long scale: one thousand million, or one milliard) ISO: giga- (G)

1010

(10 000 000 000; short scale: ten billion; long scale: ten thousand million, or ten milliard)

1011

(100 000 000 000; short scale: one hundred billion; long scale: hundred thousand million, or hundred milliard)

1012

(1 000 000 000 000; 10004; short scale: one trillion; long scale: one billion) ISO: tera- (T)

1015

(1 000 000 000 000 000; 10005; short scale: one quadrillion; long scale: one thousand billion, or one billiard) ISO: peta- (P)

1018

(1 000 000 000 000 000 000; 10006; short scale: one quintillion; long scale: one trillion) ISO: exa- (E)

1021

(1 000 000 000 000 000 000 000; 10007; short scale: one sextillion; long scale: one thousand trillion, or one trilliard) ISO: zetta- (Z)

1024

(1 000 000 000 000 000 000 000 000; 10008; short scale: one septillion; long scale: one quadrillion) ISO: yotta- (Y)

1027

(1 000 000 000 000 000 000 000 000 000; 10009; short scale: one octillion; long scale: one thousand quadrillion, or one quadrilliard) ISO: ronna- (R)

1030

(1 000 000 000 000 000 000 000 000 000 000; 100010; short scale: one nonillion; long scale: one quintillion) ISO: quetta- (Q)

1033

(1 000 000 000 000 000 000 000 000 000 000 000; 100011; short scale: one decillion; long scale: one thousand quintillion, or one quintilliard)

1036

(1 000 000 000 000 000 000 000 000 000 000 000 000; 100012; short scale: one undecillion; long scale: one sextillion)

1039

(1 000 000 000 000 000 000 000 000 000 000 000 000 000; 100013; short scale: one duodecillion; long scale: one thousand sextillion, or one sextilliard)

1042 to 10100

(1 000 000 000 000 000 000 000 000 000 000 000 000 000 000; 100014; short scale: one tredecillion; long scale: one septillion)

10100 (one googol) to 101000

(10 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000; short scale: ten duotrigintillion; long scale: ten thousand sexdecillion, or ten sexdecillard)

101000 to 1010 100 (one googolplex)

Larger than 1010 100

(One googolplex; 10googol; short scale: googolplex; long scale: googolplex)