Metric Unit Prefixes

 

Prefix Symbol Power of 10 Numerical Value
tera T 1012 trillion 1,000,000,000,000
1011 hundred-billion 100,000,000,000
1010 ten-billion 10,000,000,000
giga G 109 billion 1,000,000,000
108 hundred-million 100,000,000
107 ten-million 10,000,000
mega M 106 million 1,000,000
105 hundred-thousand 100,000
myria my 104 ten-thousand 10,000
kilo K 103 thousand 1,000
hecto h 102 hundred 100
deka 101 ten 10
100 one 1
deci d 10-1 tenth 0.1
centi c 10-2 hundredth 0.01
milli m 10-3 thousandth 0.001
10-4 ten-thousandth 0.000 1
10-5 hundred-thousandth 0.000 01
micro µ 10-6 millionth 0.000 001
10-7 ten-millionth 0.000 000 1
10-8 hundred-millionth 0.000 000 01
nano n 10-9 billionth 0.000 000 001
10-10 ten-billionth 0.000 000 000 1
10-11 hundred-billionth 0.000 000 000 01
pico p 10-12 trillionth 0.000 000 000 001
10-13 ten-trillionth 0.000 000 000 000 1
10-14 hundred-trillionth 0.000 000 000 000 01
femto f 10-15 quadrillionth 0.000 000 000 000 001
10-16 ten-quadrillionth 0.000 000 000 000 000 1
10-17 hundred-quadrillionth 0.000 000 000 000 000 01
atto a 10-18 ten-trillionth 0.000 000 000 000 000 001