18 UK tablespoons in imperial gallons
Result
The conversion result is: 18 UK tablespoons is equivalent to 0.0593916970407537 imperial gallons.[1]
Conversion formula
How to convert 18 UK tablespoons to imperial gallons?
We know (by definition) that: 1 brtablespoon ≈ 0.00329953872448632 imperialgallon.
We can set up a proportion to solve for the number of imperial gallons.
1 brtablespoon / 18 brtablespoon ≈ 0.00329953872448632 imperialgallon / x imperialgallon
Now, we cross multiply to solve for our unknown x:
x imperialgallon ≈ (18 brtablespoon / 1 brtablespoon) * 0.00329953872448632 imperialgallon → x imperialgallon ≈ 0.05939169704075376 imperialgallon
Conclusion:
18 brtablespoon ≈ 0.05939169704075376 imperialgallon

Conversion in the opposite direction
The inverse of the conversion factor is that 1 imperial gallon is equal to 16.8373703703704 times 18 UK tablespoons.
It can also be expressed as: 18 UK tablespoons is equal to 1 / 16.8373703703704 imperial gallons.
Approximation
An approximate numerical result would be: eighteen UK tablespoons is about zero point zero six imperial gallons, or alternatively, a imperial gallon is about sixteen point eight three times eighteen UK tablespoons.
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.