10-^15 or 0.000 000 000 000 001 one-quadrillionth
10-^18 or 0.000 000 000 000 000 00 one-quintillionth
Metric Interrelationships
Conversions from a multiple or submultiple to the basic units of meters, liters, or grams can be done using the table. For example, to convert from kilometers to meters, multiply by 1,000 (9.26 kilometers equals 9,260 meters) or to convert from meters to kilometers, multiply by 0.001 (9,260 meters equals 9.26 kilometers).
Prefix Symbol Length, weight, or capacity Area Volume
exa E 10^18 10^36 10^54
peta P 10^15 10^30 10^45
tera T 10^12 10^24 10^36
giga G 10^9 10^18 10^27
mega M 10^6 10^12 10^18