Convert Imperial gallons to cubic inches
1 imperial gallon = 277.42 cubic inches · in³ = imp gal × 277.4194328
When you need this conversion
This conversion goes from imperial gallons, the UK volume unit about 20 percent larger than a US gallon, to cubic inches, used for engine displacement and small volumes. Both measure the same physical quantity, so the conversion is exact — the difference is which unit your source, tool, or region happens to use.
Imperial gallons to cubic inches conversion table
| Imperial gallons (imp gal) | Cubic inches (in³) |
|---|---|
| 1 imp gal | 277.42 in³ |
| 2 imp gal | 554.84 in³ |
| 3 imp gal | 832.26 in³ |
| 5 imp gal | 1,387.1 in³ |
| 10 imp gal | 2,774.19 in³ |
| 15 imp gal | 4,161.29 in³ |
| 20 imp gal | 5,548.39 in³ |
| 25 imp gal | 6,935.49 in³ |
| 50 imp gal | 13,870.97 in³ |
| 75 imp gal | 20,806.46 in³ |
| 100 imp gal | 27,741.94 in³ |
| 250 imp gal | 69,354.86 in³ |
| 500 imp gal | 138,709.72 in³ |
| 1,000 imp gal | 277,419.43 in³ |
The formula
in³ = imp gal × 277.4194328Because both units measure volume, the conversion is a single multiplication by a fixed factor. That factor never changes, so the result is exact.
Convert the other way
Cubic inches to imperial gallons →Related volume conversions
- Milliliters to US cups
- Milliliters to US fluid ounces
- Liters to cubic meters
- Liters to US gallons
- Cubic meters to liters
- Cubic meters to cubic feet
- Cubic feet to cubic meters
- US gallons to liters
- US cups to milliliters
- US fluid ounces to milliliters
- Milliliters to cubic inches
- Liters to cubic inches
Frequently asked questions
- How many cubic inches are in a imperial gallon?
- There are 277.42 cubic inches in 1 imperial gallon. The formula is in³ = imp gal × 277.4194328.
- How do you convert imperial gallons to cubic inches?
- Use the formula in³ = imp gal × 277.4194328. For example, 10 imperial gallons equals 2,774.19 cubic inches.
- Is the imperial gallons to cubic inches conversion exact?
- Yes. Imperial gallons and cubic inches are both units of volume, related by an exact defined factor. Displayed results are rounded for readability.
- What is imp gal short for?
- imp gal is the standard symbol for imperial gallon. in³ is the symbol for cubic inch.