Si units in order largest to smallest?

Answer 1

Here's the full list of SI units I know of from largest to smallest: Yotta - Y - One septillion. (1,000,000,000,000,000,000,000,000) i.e. One yottameter / Zetta - Z - One sextillion. (1,000,000,000,000,000,000,000) i.e. One zettameter / Exa - E - One quintillion. (1,000,000,000,000,000,000,) i.e. One exameter / Peta - P - One quadrillion. (1,000,000,000,000,000) i.e. One petameter / Tera - T - One trillion. (1,000,000,000,000) i.e. One terameter / Giga - G - One billion. (1,000,000,000) i.e. One gigameter / Mega - M - One million. (1,000,000) i.e. One megameter / Kilo - k - One thousand. (1,000) i.e. One kilometer / Hecto - h - One hundred. (100) i.e. One hectometer / Deka - da - One ten. (10) i.e. One dekameter / Base - . - One (1) i.e. One meter / Deci - d - One tenth (.1) i.e. One decimeter / Centi - c - One hundredth (.01) i.e. One centimeter/ Milli - m - One thousandth (.001) i.e. One millimeter / Micro - μ - One millionth (.000001) i.e. One micrometer / Nano - n - One billionth (.000000001) i.e. One nanometer / Pico - p - One trillionth (.000000000001) i.e. One picometer / Femto - f - One quadrillionth (.000000000000001) i.e. One femtometer / Atto - a - One quintillionth (.000000000000000001) i.e. One attometer / Zepto - z - One sextillionth (.000000000000000000001) i.e. One zeptometer / Yocto - y - One septillionth (.000000000000000000000001) i.e. One yoctometer