Orders of magnitude (numbers)

This list contains selected positive numbers in increasing order, including counts of things, dimensionless quantity 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.
10−24.
ISO: yocto- (y)
10−21.
ISO: zepto- (z)
10−18.
ISO: atto- (a)
10−15.
ISO: femto- (f)
10−12.
ISO: pico- (p)
10−9.
ISO: nano- (n)
10−6.
ISO: micro- (μ)
10−3.
ISO: milli- (m)
10−2.
ISO: centi- (c)
10−1.
ISO: deci- (d)
101.
ISO: deca- (da)
102.
ISO: hecto- (h)
103.
ISO: kilo- (k)
105.
(; one hundred thousand or a lakh).
106.
ISO: mega- (M)
109.
ISO: giga- (G)
1012.
ISO: tera- (T)
1015.
ISO: peta- (P)
1018.
ISO: exa- (E)
1021.
ISO: zetta- (Z)
1024.
ISO: yotta- (Y)