Cubic Inches to UK Gallons Converter

How to convert cubic inches to imperial gallons

Formulagal (UK) = in³ × 0.00360465015

Multiply the value in cubic inches by 0.00360465015. To go the other way, multiply by 277.4194328 (or divide by 0.00360465015).

A cubic inch is smaller than an imperial gallon: it takes 277.4194328 cubic inches to make one imperial gallon.

Worked examples

1 cubic inch1 in³ × 0.00360465015 = 0.00360465015 gal (UK)
5 cubic inches5 in³ × 0.00360465015 = 0.01802325075 gal (UK)
10 cubic inches10 in³ × 0.00360465015 = 0.0360465015 gal (UK)
20 cubic inches20 in³ × 0.00360465015 = 0.072093003 gal (UK)
100 cubic inches100 in³ × 0.00360465015 = 0.360465015 gal (UK)

Cubic inches to imperial gallons conversion table

Values are calculated by the conversion engine and rounded to 8 significant figures.

Cubic inches to imperial gallons: 0.1–10 in³
Cubic inches (in³)	Imperial gallons (gal (UK))
0.1 in³	0.00036046501 gal (UK)
0.25 in³	0.00090116254 gal (UK)
0.5 in³	0.0018023251 gal (UK)
1 in³	0.0036046501 gal (UK)
2 in³	0.0072093003 gal (UK)
3 in³	0.01081395 gal (UK)
4 in³	0.014418601 gal (UK)
5 in³	0.018023251 gal (UK)
6 in³	0.021627901 gal (UK)
7 in³	0.025232551 gal (UK)
8 in³	0.028837201 gal (UK)
9 in³	0.032441851 gal (UK)
10 in³	0.036046501 gal (UK)

Cubic inches to imperial gallons: 12–1,000 in³
Cubic inches (in³)	Imperial gallons (gal (UK))
12 in³	0.043255802 gal (UK)
15 in³	0.054069752 gal (UK)
20 in³	0.072093003 gal (UK)
25 in³	0.090116254 gal (UK)
30 in³	0.1081395 gal (UK)
40 in³	0.14418601 gal (UK)
50 in³	0.18023251 gal (UK)
75 in³	0.27034876 gal (UK)
100 in³	0.36046501 gal (UK)
250 in³	0.90116254 gal (UK)
500 in³	1.8023251 gal (UK)
1,000 in³	3.6046501 gal (UK)

About the units

Cubic inch (in³)

The cubic inch (in³) is a unit of volume in the US customary system. One cubic inch equals 0.000016387064 cubic meters (m³).

Imperial gallon (gal (UK))

Exactly 4.54609 L, about 1.2 US gallons. Used in the UK for fuel economy (mpg) figures. One imperial gallon equals 0.00454609 cubic meters (m³).

Frequently asked questions

How many imperial gallons are in one cubic inch?

There are 0.00360465015 imperial gallons in one cubic inch, and this value is exact by definition.

How do I convert cubic inches to imperial gallons?

Multiply the number of cubic inches by 0.00360465015. For example, 10 in³ × 0.00360465015 = 0.0360465015 gal (UK).

How many cubic inches are in one imperial gallon?

One imperial gallon equals 277.4194328 cubic inches. That is the reverse factor, 1 ÷ 0.00360465015.

What is 10 cubic inches in imperial gallons?

10 in³ = 0.0360465015 gal (UK).

Is this in³ to gal (UK) converter accurate?

Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.