How to Convert US gallons to Cubic centimetres (gal to cm³)
Volume conversions help with baking from American recipes, comparing petrol prices quoted per gallon abroad with pump prices per litre here, and reading PUB water bills in cubic metres. This guide shows how to convert us gallons into cubic centimetres by hand, with examples and a quick-reference table.
The conversion
To convert us gallons to cubic centimetres, multiply the value by 3,785.41. To go the other way, divide by the same number (or multiply by 0.0002641722). For a quick estimate, multiply by about 3,800.
Cubic centimetres = us gallons × 3,785.41
Worked examples
- 3 gal = 11,356.23 cm³
- 12.5 gal = 47,317.63 cm³
- 75 gal = 283,905.75 cm³
US gallons to Cubic centimetres table
| US gallons | Cubic centimetres |
|---|---|
| 1 gal | 3,785.41 cm³ |
| 2 gal | 7,570.82 cm³ |
| 5 gal | 18,927.05 cm³ |
| 10 gal | 37,854.1 cm³ |
| 20 gal | 75,708.2 cm³ |
| 25 gal | 94,635.25 cm³ |
| 50 gal | 189,270.5 cm³ |
| 100 gal | 378,541 cm³ |
| 250 gal | 946,352.5 cm³ |
| 500 gal | 1,892,705 cm³ |
| 1,000 gal | 3,785,410 cm³ |
Common questions
Is gal to cm³ exact?
The factors used here are the internationally defined values where they exist; results are rounded for display only.
How do I convert back?
Use the Cubic centimetres to US gallons converter.
Mistakes to avoid
Mixing similar-sounding units
US and imperial gallons, pints and tons are different sizes, and decimal kilobytes differ from binary kibibytes.
Forgetting squared and cubed units
Area and volume factors are the length factor squared or cubed, so 1 m² is about 10.76 sq ft, not 3.28.
Dropping the units
A bare number without a unit is easy to misread later. Always write the unit with the result.
Background
Writing the units next to every number while you work is the simplest way to avoid mistakes. If the units do not cancel to leave the one you want, the calculation is set up wrongly.
Unit conversion is simply multiplication by a fixed ratio. The ratio between two units of the same quantity never changes, so once you know it you can convert any value in either direction.
Many conversion factors are exact by definition. The inch has been defined as exactly 2.54 centimetres since 1959, and the pound as exactly 0.45359237 kilograms, so conversions involving them can be as precise as you need.
For any value, use the US gallons to Cubic centimetres Converter or browse all volume converters.
Run your own numbers: US gallons to Cubic centimetres Converter