# How do you convert 13 pounds to ounces?

There are $16$ $\text{oz}$ ${\text{lb}}^{-} 1$. (At least there are in the avoirdupois system.)
So $13$ $\text{lb}$ $\times$ $16$ $o z$ $l {b}^{-} 1$ $=$ $208$ $o z$.