640 US customary teaspoons in imperial gallons

Result

The conversion result is: 640 US customary teaspoons is equivalent to 0.693895153857491 imperial gallons.[1]

Conversion formula
How to convert 640 US customary teaspoons to imperial gallons?

We know (by definition) that: 1 usteaspoon ≈ 0.00108421117790233 imperialgallon.

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

1 usteaspoon / 640 usteaspoon ≈ 0.00108421117790233 imperialgallon / x imperialgallon

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

x imperialgallon ≈ (640 usteaspoon / 1 usteaspoon) * 0.00108421117790233 imperialgallon → x imperialgallon ≈ 0.6938951538574912 imperialgallon

Conclusion:

640 usteaspoon ≈ 0.6938951538574912 imperialgallon

Conversion in the opposite direction

The inverse of the conversion factor is that 1 imperial gallon is equal to 1.44113991060583 times 640 US customary teaspoons.

It can also be expressed as: 640 US customary teaspoons is equal to 1 / 1.44113991060583 imperial gallons.

Approximation

An approximate numerical result would be: six hundred and forty US customary teaspoons is about zero point six nine imperial gallons, or alternatively, a imperial gallon is about one point four three times six hundred and forty 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.