Yoctometre

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The yoctometre (International spelling as used by the International Bureau of Weights and Measures; SI symbol: ym) or yoctometer (American spelling) is an SI measure of length that is equal to 10⁻²⁴ (yocto) of a metre. It is the smallest named subdivision of the metre in the SI base unit of length.

Uses

In terms of relative length of units, a yoctometre ranks as follows: Planck length << yoctometre << zeptometre. A yoctometre is 1/1000 of a zeptometre (1 zeptometre (zm) = 1,000 yoctometres). The Planck length is about 1.6 × 10⁻¹¹ ym.

SI units of length

From smallest to largest (left to right). Commonly used units shown in bold italics.

yoctometre (1×10⁻²⁴ m) zeptometre attometre femtometre picometre nanometre micrometre millimetre centimetre decimetre metre (m) decametre hectometre kilometre megametre gigametre terametre petametre exametre zettametre yottametre (1×10²⁴ m)

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Yoctometre

Uses

See also