MATHEMATICAL NOTATION
MATHEMATICAL POWER NAME
10^18 or 1,000,000,000,000,000,000 one quintillion 10^15 or 1,000,000,000,000,000 one quadrillion 10^12 or 1,000,000,000,000 one trillion 10^9 or 1,000,000,000 one billion 10^6 or 1,000,000 one million 10^3 or 1,000 one thousand 10^2 or 100 one hundred 10^1 or 10 ten 100 or 1 one 10^-1 or 0.1 one-tenth 10^-2 or 0.01 one-hundredth 10^-3 or 0.001 one-thousandth 10^-6 or 0.000 001 one-millionth 10^-9 or 0.000 000 001 one-billionth 10^-12 or 0.000 000 000 001 one-trillionth 10^-15 or 0.000 000 000 000 001 one-quadrillionth 10^-18 or 0.000 000 000 000 000 001 one-quintillionth
Metric Interrelationships
PREFIX SYMBOL LENGTH, WEIGHT, OR CAPACITY yotta Y 1024 zetta Z 1021 exa E 1018 peta P 1015 tera T 1012 giga G 109 mega M 106 kilo k 103 hecto h 102 deka da 101 basic unit - 1 meter, 1 gram, 1 liter deci d 10-1 centi c 10-2 milli m 10 -3 micro u 10-6 nano n 10-9 pico p 10-12 femto f 10-15 atto a 10-18 zepto z 10-21 yocto y 10-24