Metric (SI) prefixes

tera (T) 1012 deci (d) 10-1
giga (G) 109 centi (c) 10-2
mega (M) 106 mili (m) 10-3
kilo (k) 103 micro (µ) 10-6
hecto (h) 102 nano (n) 10-9
deca (da) 10 pico (p) 10-12


Related:
length conversion
Physical constants