# 390 US customary cups in imperial gallons

## Conversion

390 US customary cups is equivalent to 20.2964332503316 imperial gallons.^{[1]}

## Conversion formula

How to convert 390 US customary cups to imperial gallons?

We know (by definition) that: $1\mathrm{uscup}\approx 0.0520421365393118\mathrm{imperialgallon}$

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

$\frac{1\mathrm{uscup}}{390\mathrm{uscup}}\approx \frac{0.0520421365393118\mathrm{imperialgallon}}{x\mathrm{imperialgallon}}$Now, we cross multiply to solve for our unknown $x$:

$x\mathrm{imperialgallon}\approx \frac{390\mathrm{uscup}}{1\mathrm{uscup}}*0.0520421365393118\mathrm{imperialgallon}\to x\mathrm{imperialgallon}\approx 20.296433250331603\mathrm{imperialgallon}$Conclusion: $390\mathrm{uscup}\approx 20.296433250331603\mathrm{imperialgallon}$

## Conversion in the opposite direction

The inverse of the conversion factor is that **1 imperial gallon is equal to 0.0492697405335325 times 390 US customary cups**.

It can also be expressed as: 390 US customary cups is equal to $\frac{1}{\mathrm{0.0492697405335325}}$ imperial gallons.

## Approximation

An approximate numerical result would be: **three hundred and ninety US customary cups is about twenty point three zero imperial gallons**, or alternatively, *a imperial gallon is about zero point zero five times three hundred and ninety US customary cups*.

## 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.