664 US customary teaspoons in US gallons
Result
The conversion result is: 664 US customary teaspoons is equivalent to 0.864583333333333 US gallons.[1]
Conversion formula
How to convert 664 US customary teaspoons to US gallons?
We know (by definition) that: 1 usteaspoon ≈ 0.00130208333333333 usgallon.
We can set up a proportion to solve for the number of US gallons.
1 usteaspoon / 664 usteaspoon ≈ 0.00130208333333333 usgallon / x usgallon
Now, we cross multiply to solve for our unknown x:
x usgallon ≈ (664 usteaspoon / 1 usteaspoon) * 0.00130208333333333 usgallon → x usgallon ≈ 0.8645833333333311 usgallon
Conclusion:
664 usteaspoon ≈ 0.8645833333333311 usgallon
Conversion in the opposite direction
The inverse of the conversion factor is that 1 US gallon is equal to 1.1566265060241 times 664 US customary teaspoons.
It can also be expressed as: 664 US customary teaspoons is equal to 1 / 1.1566265060241 US gallons.
Approximation
An approximate numerical result would be: six hundred and sixty-four US customary teaspoons is about zero point eight six US gallons, or alternatively, a US gallon is about one point one five times six hundred and sixty-four US customary teaspoons.
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.