21 US customary teaspoons in US gallons
Result
The conversion result is: 21 US customary teaspoons is equivalent to 0.02734375 US gallons.[1]
Conversion formula
How to convert 21 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 / 21 usteaspoon ≈ 0.00130208333333333 usgallon / x usgallon
Now, we cross multiply to solve for our unknown x:
x usgallon ≈ (21 usteaspoon / 1 usteaspoon) * 0.00130208333333333 usgallon → x usgallon ≈ 0.02734374999999993 usgallon
Conclusion:
21 usteaspoon ≈ 0.02734374999999993 usgallon
Conversion in the opposite direction
The inverse of the conversion factor is that 1 US gallon is equal to 36.5714285714286 times 21 US customary teaspoons.
It can also be expressed as: 21 US customary teaspoons is equal to 1 / 36.5714285714286 US gallons.
Approximation
An approximate numerical result would be: twenty-one US customary teaspoons is about zero point zero three US gallons, or alternatively, a US gallon is about thirty-six point five seven times twenty-one 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.