640 liters in US quarts

Conversion formula
How to convert 640 liters to US quarts?

We know (by definition) that: $1\mathrm{liter}\approx 1.05668820943259\mathrm{usquart}$

We can set up a proportion to solve for the number of US quarts.

Now, we cross multiply to solve for our unknown $x$:

Conclusion: 640 ⁢ liter ≈ 676.2804540368576 ⁢ usquart

Conversion in the opposite direction

The inverse of the conversion factor is that 1 US quart is equal to 0.001478676478125 times 640 liters.

It can also be expressed as: 640 liters is equal to $\frac{1}{\mathrm{0.001478676478125}}$ US quarts.

Approximation

An approximate numerical result would be: six hundred and forty liters is about six hundred and seventy-six point two seven US quarts, or alternatively, a US quart is about zero times six hundred and forty liters.