21 US gallons in liters

Conversion formula
How to convert 21 US gallons to liters?

We know (by definition) that: $1\mathrm{usgallon}\approx 3.785411784\mathrm{liter}$

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

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

Conclusion: 21 ⁢ usgallon ≈ 79.49364746399999 ⁢ liter

Conversion in the opposite direction

The inverse of the conversion factor is that 1 liter is equal to 0.0125796215408642 times 21 US gallons.

It can also be expressed as: 21 US gallons is equal to $\frac{1}{\mathrm{0.0125796215408642}}$ liters.

Approximation

An approximate numerical result would be: twenty-one US gallons is about seventy-nine point four eight liters, or alternatively, a liter is about zero point zero one times twenty-one US gallons.