In order to keep figures short and presentable, SI prefixes are often attached to units such as m (meter) or g (gram).
For example, a substance weighing 0.000 000 001 g may be described more simply as 1 ng (nanogram) or as 1000 pg (picograms).
Common prefixes of the International System of Units (SI) are:
p | pico | = 1 000 000 000 000th | = 10-12 |
n | nano | = 1 000 000 000th | = 10-9 |
µ | micro | = 1 000 000th | = 10-6 |
m | milli | = 1 000th | = 10-3 |
no prefix | = 1 | ||
k | kilo | = 1 000 | = 103 |
M | Mega | = 1 000 000 | = 106 |
G | Giga | = 1 000 000 000 | = 109 |
T | Tera | = 1 000 000 000 000 | = 1012 |
Español: Prefijos de las Unidades de Medida