# How do you convert 4 L to pt?

Sep 3, 2016

$4 \cdot L = 6.7$ $\text{imperial pints}$ $=$ $8.5 \text{ US pints}$.

#### Explanation:

$1 \cdot \text{pint}$ $=$ $568 \cdot m L$.

$1000 \cdot m L$ $=$ $1 \cdot L$.

$4 \cdot L$ $=$ $4000 \cdot m L \times \left(\text{1 pint")/("568 mL}\right)$ $=$ $7 \cdot \text{pints}$.

Of course you are quite probably a yank. And thus we should use the $\text{US liquid pint} = 473 \cdot m L$. (They also use a dry pint, whose volume I forget!),

Thus $4 \cdot L$ $=$ $4000 \cdot m L \times \left(\text{1 pint")/("473 mL}\right)$ $=$ $8.5 \text{ US pints}$.

I think this is a persuasive demonstration of the absurdity of non-SI units. Pints and gallons are all very well, but when there are $\text{US and Imperial pints}$ this is bound to cause confusion (as it probably has here!).