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.

(0.000000000000000000000000000001; 1000⁻¹⁰; short scale: one nonillionth; long scale: one quintillionth)

(0.000000000000000000000000001; 1000⁻⁹; short scale: one octillionth; long scale: one quadrilliardth)

(0.000000000000000000000001; 1000⁻⁸; short scale: one septillionth; long scale: one quadrillionth)

ISO: yocto- (y)

(0.000000000000000000001; 1000⁻⁷; short scale: one sextillionth; long scale: one trilliardth)

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