Volume
mm³togal (UK)
Convert cubic millimetres (mm³) to imperial gallons (gal (UK)).
Factor1 mm³ = 2.199692e-7 gal (UK)
Converter
mm³
Accepts numbers or expressions, e.g. 150 + 14.7
Result
gal (UK)
Rendered to 6 significant figures.
Formula
Formula
gal (UK) = mm³ × 2.199692e-7
Multiply any value in cubic millimetres by 2.199692e-7 to obtain the value in imperial gallons.
Worked example
Convert 1.00000e+6 mm³ to gal (UK).
- 01Start with 1.00000e+6 mm³.
- 02Multiply by the conversion factor: 1.00000e+6 × 2.199692e-7 = 0.219969 gal (UK).
Result1.00000e+6 mm³ = 0.219969 gal (UK)
Conversion table
| mm³ | gal (UK) |
|---|---|
| 1 | 2.1997e-7 |
| 2 | 4.3994e-7 |
| 5 | 1.0998e-6 |
| 10 | 2.1997e-6 |
| 20 | 4.3994e-6 |
| 50 | 1.0998e-5 |
| 100 | 2.1997e-5 |
| 200 | 4.3994e-5 |
| 500 | 0.00010998 |
| 1000 | 0.00021997 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from mm³ to gal (UK)?
1 mm³ equals 2.199692e-7 gal (UK). To convert, multiply the value in cubic millimetres by 2.199692e-7.
How do I convert 1 mm³ to gal (UK)?
1 mm³ = 2.19969e-7 gal (UK). For any value, multiply by 2.199692e-7.
How do I convert gal (UK) back to mm³?
Divide by the same factor — or equivalently, multiply by 4546090. So 1 gal (UK) = 4.54609e+6 mm³.
When would I need to convert cubic millimetre to imperial gallon?
Volume conversions are used for tank sizing, batch calculations, and bridging between vendor specs (gallons, barrels, ft³) and process documentation (m³, litres).
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).