 Milligram

A milligram is $10^{-3}$ gram, equivalently $10^{-6}$ kilogram. Its symbol is $\mathrm{mg}$. For example, $25\mathrm{mg}=0.025\mathrm{g}$.

The prefix specifies a decimal scaling of mass; it gives no information about measurement precision. An instrument displaying milligrams can still have a larger measurement uncertainty because of calibration, drift or environmental effects.^[ref]