# to convert mg to kg

• October 15th 2010, 02:13 AM
r-soy
to convert mg to kg
Hi

I want help to convert mg to kg

ex: 1250mg --- > kg

Are we multiply 1250mg X 10^-3

or multiply 1250mg X 10^-6

$10^{-6}$
A more detailed way of looking at it: There are 1000 "milli"gram in a gram: $1= \frac{1000 mg}{1 g}$ and 1000 grams in a "kilo"gram.
So $(1000 mg/g)(1000 g/kg)= 1000000 mg/kg= 10^6 mg/kg$- the "grams" cancel.
$10^6 mg/kg$ is the same as $10^{-6} kg/mg$