This converter turns cubic centimeters into imperial gallons instantly, using the exact factor 1 cubic centimeter = 0.0002199692483 imperial gallons. Type any number and the result updates as you go — nothing is sent to a server, so the arithmetic happens entirely in your browser.
Identical to a millilitre; the classic unit for engine displacement. Exactly 4.54609 litres, about 20% larger than the US gallon.
Because the relationship is a simple proportion, one multiplication does the whole job. The table further down gives pre-computed values for the amounts people look up most often, and the result panel also reports the reverse conversion so you can check the figure both ways.
The formula
cubic centimeters- The amount you are converting, measured in cubic centimeters
0.0002199692483- The exact number of imperial gallons in one cubic centimeter
imperial gallons- The converted result
How it works, step by step
- Enter the number of cubic centimeters you want to convert.
- The value is multiplied by 0.0002199692483, the exact conversion factor.
- The result is displayed in imperial gallons, rounded for readability.
- The unrounded value and the reverse conversion appear underneath so you can verify it.
Worked examples
Converting 5 cubic centimeters
Multiply 5 by 0.00021996925. That gives 0.0011 imperial gallons. A quick sanity check: one cubic centimeter is smaller than one imperial gallon, so the number should get smaller — and it does.
Converting 72 cubic centimeters
72 × 0.00021996925 = 0.015838 imperial gallons. Working backwards, 0.015838 ÷ 0.00021996925 returns 72 cubic centimeters, which confirms the factor is applied the right way round.
How to read your score
Frequently asked questions
How many imperial gallons are in one cubic centimeter?
Exactly 0.0002199692483. Every conversion on this page is that single number multiplied by your input, so the result carries no rounding error beyond what is shown.
What is the formula to convert cubic centimeters to imperial gallons?
Imperial Gallons = cubic centimeters × 0.0002199692483. To reverse it, divide instead: cubic centimeters = imperial gallons ÷ 0.0002199692483, which is the same as multiplying by 4546.09.
Is the cubic centimeter bigger than the imperial gallon?
No. One cubic centimeter is only 0.000219969 of a imperial gallon, so the imperial gallon is the larger unit.
Why does my answer differ slightly from other cubic-centimeters to imperial-gallons converters?
Most differences come from rounding the factor too early. This tool keeps full double precision through the calculation and only rounds at the final display step, and it also shows the unrounded value so you can see exactly where any difference appears.
What is a cubic centimeter?
Identical to a millilitre; the classic unit for engine displacement.
What is a imperial gallon?
Exactly 4.54609 litres, about 20% larger than the US gallon.
Cubic Centimeters to imperial gallons reference table
| Cubic Centimeters | Imperial Gallons |
|---|---|
| 0.5 cm³ | 0.00011 gal |
| 1 cm³ | 0.00022 gal |
| 2 cm³ | 0.00044 gal |
| 3 cm³ | 0.00066 gal |
| 5 cm³ | 0.0011 gal |
| 10 cm³ | 0.0022 gal |
| 15 cm³ | 0.0033 gal |
| 20 cm³ | 0.004399 gal |
| 25 cm³ | 0.005499 gal |
| 50 cm³ | 0.010998 gal |
| 75 cm³ | 0.016498 gal |
| 100 cm³ | 0.021997 gal |
| 250 cm³ | 0.054992 gal |
| 500 cm³ | 0.109985 gal |
| 1000 cm³ | 0.219969 gal |
Exact factor: 1 cubic centimeter = 0.0002199692483 imperial gallons. Values rounded for display.