Gallons to Cubic Centimeters
An instant gallons-to-cubic centimeters converter, with the formula and a reference table below.
| Gallons | Cubic Centimeters |
|---|---|
| 1 gal | 3785.411784 cm³ |
| 2 gal | 7570.823568 cm³ |
| 3 gal | 11356.235352 cm³ |
| 5 gal | 18927.05892 cm³ |
| 10 gal | 37854.11784 cm³ |
| 25 gal | 94635.2946 cm³ |
| 50 gal | 189270.5892 cm³ |
| 100 gal | 378541.1784 cm³ |
How to use
- Enter a value in the Gallons field.
- The Cubic Centimeters figure appears immediately — no button to press.
- Typing in the Cubic Centimeters field converts back to Gallons the same way.
- Use the reference table for the values that come up most often.
Gallons to Cubic Centimeters formula
The factor from gallons to cubic centimeters is 3785.41178.
cm³ = gal × 3785.41178
Why this factor: the gallon and the cubic centimeter are both defined against the liter, so dividing one definition by the other gives 3785.41178 directly. Both definitions are set out in full below.
To go the other way, divide by 3785.41178 — or use the Cubic Centimeters to Gallons converter, which is the same calculation reversed.
Worked example
Given 2 gal, multiplying by 3785.41178 yields 7570.823568 cm³.
2 gal × 3785.41178 = 7570.823568 cm³
The converter above does this for any value you type, in either direction.
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.
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'.
Gallons vs Cubic Centimeters
The gallon is a US customary unit while the cubic centimeter is a metric 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 cubic centimeters are in a gallon?
One gallon equals 3785.41178 cubic centimeters.
What is the formula to convert gallons to cubic centimeters?
Multiply the number of gallons by 3785.41178. To reverse it, divide by 3785.41178 instead.
How do I convert cubic centimeters back to gallons?
Divide by 3785.41178, which is the same as multiplying by 0.000264172052.
How many cubic centimeters are in 10 gallons?
10 gal works out to 37854.11784 cm³.
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 gallon defined?
Defined as exactly 231 cubic inches, which works out to exactly 3.785411784 liters.