one-trillionth

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

hectokilo hk 10^5 10^10 10^15

myria ma 10^4 10^8 10^12

kilo k 10^3 10^6 10^9

hecto h 10^2 10^4 10^6

basic unit - 1 meter, 1 meter^2 1 meter^3
1 gram,
1 liter

deci d 10-^1 10-^2 10-^3

centi c 10-^2 10-^4 10-^6

milli m 10-^3 10-^6 10-^9

decimilli dm 10-^4 10-^8 10-^12

centimilli cm 10-^5 10-^10 10-^15

micro u 10-^6 10-^12 10-^18

nano n 10-^9 10-^18 10-^27

pico p 10-^12 10-^24 10-^36

femto f 10-^15 10-^30 10-^45

atto a 10-^18 10-^36 10-^54

Equivalents

Units Metric Equivalent US Equivalent

acre 0.404 685 64 hectares 43,560 feet^2

acre 4,046,856 4 meters^2 4,840 yards^2

acre 0.004 046 856 4 0.001 562 5 miles^2,
kilometers^2 statute

are 100 meters^2 119.599 yards^2

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