How to Convert Cubic centimetres to US gallons (cm³ to gal)
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 cubic centimetres into us gallons by hand, with examples and a quick-reference table.
The conversion
To convert cubic centimetres to us gallons, multiply the value by 0.0002641722. To go the other way, divide by the same number (or multiply by 3,785.41). Because the factor is tiny, scientific notation keeps the numbers manageable.
US gallons = cubic centimetres × 0.0002641722
Worked examples
- 3 cm³ = 0.000793 gal
- 12.5 cm³ = 0.003302 gal
- 75 cm³ = 0.019813 gal
Cubic centimetres to US gallons table
| Cubic centimetres | US gallons |
|---|---|
| 1 cm³ | 0.000264 gal |
| 2 cm³ | 0.000528 gal |
| 5 cm³ | 0.001321 gal |
| 10 cm³ | 0.002642 gal |
| 20 cm³ | 0.005283 gal |
| 25 cm³ | 0.006604 gal |
| 50 cm³ | 0.013209 gal |
| 100 cm³ | 0.026417 gal |
| 250 cm³ | 0.066043 gal |
| 500 cm³ | 0.132086 gal |
| 1,000 cm³ | 0.264172 gal |
Common questions
Is cm³ to gal 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 US gallons to Cubic centimetres 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.
Dropping the units
A bare number without a unit is easy to misread later. Always write the unit with the result.
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.
Background
Singapore adopted the metric system in the 1970s, replacing imperial units and traditional Chinese measures in most official uses. Metric units are now standard in schools, trade and government, but older units survive in property, markets and imported goods.
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.
A conversion table is handy for common values, but a calculator is faster and avoids interpolation errors for anything in between.
For any value, use the Cubic centimetres to US gallons Converter or browse all volume converters.
Run your own numbers: Cubic centimetres to US gallons Converter