721 imperial gallons in US gallons

Conversion formula
How to convert 721 imperial gallons to US gallons?

We know (by definition) that: $1\mathrm{imperialgallon}\approx 1.20094992550486\mathrm{usgallon}$

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

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

Conclusion: 721 ⁢ imperialgallon ≈ 865.884896289004 ⁢ usgallon

Conversion in the opposite direction

The inverse of the conversion factor is that 1 US gallon is equal to 0.00115488791210678 times 721 imperial gallons.

It can also be expressed as: 721 imperial gallons is equal to $\frac{1}{\mathrm{0.00115488791210678}}$ US gallons.

Approximation

An approximate numerical result would be: seven hundred and twenty-one imperial gallons is about eight hundred and sixty-five point eight seven US gallons, or alternatively, a US gallon is about zero times seven hundred and twenty-one imperial gallons.