SI Prefixes

[Rennhack]

Many units are broken down into smaller units or expressed as multiples, using standard metric prefixes. As examples, a kilobecquerel (kBq) is 1000 Becquerel, a millirad (mrad) is 10-3 RAD, a microrem (µrem) is 10-6 rem, a nanogram is 10-9 grams, and a picocurie is a 10-12 curies.

SI Prefixes
Factor - Prefix - Symbols

10¹⁸ - exa - E
10^{15 -} - peta - P
10¹² - tera - T
10⁹ - giga - G
10^{6 -} - mega - M
10³ - kilo - k
10² - hecto - h
10¹ - deka - da

10^-1 - deci - d
10^-2 - centi - c
10^-3 - milli - m
10^-6 - micro - µ
10^-9 - nano - n
10^-12 - pico - p
10^-15 - femto - f
10^-18 - atto - a