Cubic Centimeters to Gallons
Type a value in either box to convert between cubic centimeters and gallons. The factor is 0.000264172.
| Cubic Centimeters | Gallons |
|---|---|
| 1 cm³ | 0.000264 gal |
| 2 cm³ | 0.000528 gal |
| 3 cm³ | 0.000793 gal |
| 5 cm³ | 0.001321 gal |
| 10 cm³ | 0.002642 gal |
| 25 cm³ | 0.006604 gal |
| 50 cm³ | 0.013209 gal |
| 100 cm³ | 0.026417 gal |
How to use
- Enter a value in the Cubic Centimeters field.
- The Gallons figure appears immediately — no button to press.
- Typing in the Gallons field converts back to Cubic Centimeters the same way.
- Use the reference table for the values that come up most often.
Cubic Centimeters to Gallons formula
Converting cubic centimeters to gallons is a single multiplication by 0.000264172052.
gal = cm³ × 0.000264172052
Why this factor: the cubic centimeter and the gallon are both defined against the liter, so dividing one definition by the other gives 0.000264172052 directly. Both definitions are set out in full below.
To go the other way, divide by 0.000264172052 — or use the Gallons to Cubic Centimeters converter, which is the same calculation reversed.
Worked example
Start with 50 cm³. Multiply by 0.000264172052 to get 0.013209 gal.
50 cm³ × 0.000264172052 = 0.013209 gal
The converter above does this for any value you type, in either direction.
What is a cubic centimeter?
A cubic centimeter is the volume of a one-centimeter cube, identical to a milliliter.
Definition: Exactly 1×10⁻⁶ cubic meter, which is exactly 1 mL.
Where it is used: Engine displacement on motorcycles and small engines, and medical volumes where it is written 'cc'.
What is a gallon?
A US liquid gallon is the standard large-volume unit in the United States.
Definition: Defined as exactly 231 cubic inches, which works out to exactly 3.785411784 liters.
Where it is used: Fuel sales, milk and beverage containers, and paint in the US.
Worth knowing: The imperial gallon used in the UK and Canada is about 20% larger, at 4.54609 L — so 'miles per gallon' figures are not comparable between the two.
Cubic Centimeters vs Gallons
The cubic centimeter is a metric unit while the gallon is a US customary unit. That is why the factor between them is not a round number: the two systems were defined independently and only later tied together by exact agreement.
Frequently asked questions
How many gallons are in a cubic centimeter?
One cubic centimeter equals 0.000264172052 gallons.
What is the formula to convert cubic centimeters to gallons?
Multiply the number of cubic centimeters by 0.000264172052. To reverse it, divide by 0.000264172052 instead.
How do I convert gallons back to cubic centimeters?
Divide by 0.000264172052, which is the same as multiplying by 3785.41178.
How many gallons are in 10 cubic centimeters?
10 cm³ works out to 0.002642 gal.
Is there anything to watch out for with gallons?
The imperial gallon used in the UK and Canada is about 20% larger, at 4.54609 L — so 'miles per gallon' figures are not comparable between the two.
How is the cubic centimeter defined?
Exactly 1×10⁻⁶ cubic meter, which is exactly 1 mL.