# Cubic Inches to Gallons Converter

Welcome to Omni's cubic inches to gallons converter, which allows you to quickly calculate **cubic inches to gallons**, and it is you who decides whether it is US gallons or UK gallons! As a bonus, we will show you the cubic inches to gallons formula and explain how to do this conversion by hand. Let's go!

## Cubic inches to gallons formula

**Gallon (gal)** is a volume unit, and it can be either a **US gallon** or **UK gallon**. A US gallon is exactly `231 cu in`

(cubic inches, also `in³`

), while a UK gallon is `277.4 cu in`

. Equivalently, `1 cu in`

corresponds to `0.0043`

US gallon and `0.0036`

UK gallon. As you can see, UK gallons are slightly bigger than US gallons.

## How do I convert cubic inches to US gallons?

To convert cubic inches to US gallons:

- Write down the volume in cubic inches.
- Multiply this number by
`0.0043`

. - That's it! The number you got is the volume expressed in US gallons.

## How do I convert cubic inches to UK gallons?

To convert cubic inches to UK gallons:

- Write down the volume in cubic inches.
- Multiply this number by
`0.0036`

. - That's it! The number you got is the volume expressed in UK gallons.

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## FAQ

### How do I convert 1 cubic inch to gallons?

To calculate 1 cubic inch to gallons:

- Write down the volume in cubic inches.
- Multiply this number by
`0.0043`

if you want to convert it into US gallons. - Multiply this number by
`0.0036`

if you want to convert it into UK gallons.