18 US quarts in US gallons

Result

The conversion result is: 18 US quarts is equivalent to 4.5 US gallons.[1]

Conversion formula
How to convert 18 US quarts to US gallons?

We know (by definition) that: 1 usquart ≈ 0.25 usgallon.

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

1 usquart / 18 usquart ≈ 0.25 usgallon / x usgallon

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

x usgallon ≈ (18 usquart / 1 usquart) * 0.25 usgallon → x usgallon ≈ 4.5 usgallon

Conclusion:

18 usquart ≈ 4.5 usgallon

Conversion in the opposite direction

The inverse of the conversion factor is that 1 US gallon is equal to 0.222222222222222 times 18 US quarts.

It can also be expressed as: 18 US quarts is equal to 1 / 0.222222222222222 US gallons.

Approximation

An approximate numerical result would be: eighteen US quarts is about zero US gallons, or alternatively, a US gallon is about zero point two two times eighteen US quarts.

Footnotes

[1] The precision is 15 significant digits (fourteen digits to the right of the decimal point).

Results may contain small errors due to the use of floating point arithmetic.