Convert Imperial Gallons to Cubic Centimeters
1 imperial gallon (gal (imp)) equals 4546.09 cubic centimeters (cm³).
1 gal (imp) = 4546.09 cm³
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk imperial gallon to cubic centimeter converter to paste a column from Excel.
How to Convert Imperial Gallon to Cubic Centimeter
- 1 gal (imp) = 4546.09 cm³
- 1 cm³ = 0.0002199692483 gal (imp)
- Example: convert 15 gal (imp) to cm³: 15 gal (imp) = 15 × 4546.09 cm³ = 68191.35 cm³
Formula
cm³ = gal (imp) × 4546.09
Derivation from SI units:
- 1 imp gal = 4.54609 L = 0.00454609 m³ (exact, by definition)
- 1 cm³ = (0.01 m)³ = 10⁻⁶ m³ = 1 mL
- 1 gal (imp) = 0.00454609 m³ ÷ 0.000001 m³ per cm³ = 4546.09 cm³
Both units are defined exactly, so the factor is exact. Imperial Gallon definition: imperial gallon; Cubic Centimeter definition: cubic centimeter.
Worked examples
- A reading of 5 gal (imp) converts to 22730.45 cm³.
5 gal (imp) × 4546.09 = 22730.45 cm³ - A value of 25 gal (imp) is 113652.25 cm³.
25 gal (imp) × 4546.09 = 113652.25 cm³
Imperial Gallon to Cubic Centimeter conversion table
| Imperial Gallons (gal (imp)) | Cubic Centimeters (cm³) |
|---|---|
| 0.25 gal (imp) | 1136.5225 cm³ |
| 0.5 gal (imp) | 2273.045 cm³ |
| 1 gal (imp) | 4546.09 cm³ |
| 2 gal (imp) | 9092.18 cm³ |
| 5 gal (imp) | 22730.45 cm³ |
| 10 gal (imp) | 45460.9 cm³ |
| 15 gal (imp) | 68191.35 cm³ |
| 20 gal (imp) | 90921.8 cm³ |
| 25 gal (imp) | 113652.25 cm³ |
| 40 gal (imp) | 181843.6 cm³ |
| 50 gal (imp) | 227304.5 cm³ |
| 100 gal (imp) | 454609 cm³ |
| 1000 gal (imp) | 4546090 cm³ |
Where it's used
Imperial Gallons are used for fuel economy in the UK (miles per gallon), while cubic centimeters appear in engine displacement (e.g. 125 cc, 1600 cc). Both measure volume (capacity), so the conversion is a fixed factor.
Imperial Gallon to other volume units
| Conversion | 1 gal (imp) equals |
|---|---|
| imperial gallon to cubic meter | 0.00454609 m³ |
| imperial gallon to liter | 4.54609 L |
| imperial gallon to milliliter | 4546.09 mL |
| imperial gallon to cubic centimeter | 4546.09 cm³ |
| imperial gallon to cubic foot | 0.1605436532 ft³ |
| imperial gallon to cubic inch | 277.4194328 in³ |
| imperial gallon to US gallon | 1.200949926 gal (US) |
Frequently asked questions
How many cubic centimeters are in 1 imperial gallon?
1 gal (imp) = 4546.09 cm³.
How do I convert imperial gallons to cubic centimeters?
Multiply the value in gal (imp) by 4546.09. For example, 15 gal (imp) × 4546.09 = 68191.35 cm³.
Is the gal (imp) to cm³ conversion exact?
Yes. Both units are defined exactly, and 1 gal (imp) is exactly 4546.09 cm³.
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "gallon [Canadian and U.K. (Imperial)]".
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 2 with SI prefix centi.
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Imperial Gallons to Cubic Centimeters. Retrieved October 17, 2026, from https://scientificconverters.com/volume/imperial-gallons-to-cubic-centimeters/
IEEE
Scientific Converters, "Convert Imperial Gallons to Cubic Centimeters," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/volume/imperial-gallons-to-cubic-centimeters/