Volume conversion
1 imperial gallon (imp gal) equals 1.200949925505 us gallon (US gal). Enter any value below to convert from imp gal to US gal.
Enter a value and choose units. Results update instantly.
1 imp gal = 1.2009499255 US gal
| Unit | Value |
|---|---|
| Cubic meter m³ | 0.00454609 |
| Liter L | 4.54609 |
| Milliliter mL | 4,546.09 |
| Cubic centimeter cm³ | 4,546.09 |
| Cubic inch in³ | 277.4194327916 |
| Cubic foot ft³ | 0.1605436532 |
| US gallon US gal | 1.2009499255 |
| Imperial gallon imp gal | 1 |
| US quart US qt | 4.803799702 |
| US customary cup US cup | 19.2151988081 |
| US fluid ounce US fl oz | 153.7215904646 |
Formula
Use this relationship for a direct conversion:
2 imp gal = 2.401899851 US gal.
US liquid and Imperial gallon definitions are treated separately and use their exact legal values.
Quick reference
| Imperial gallon (imp gal) | US gallon (US gal) |
|---|---|
| 0.01 | 0.0120094993 |
| 0.1 | 0.1200949926 |
| 1 | 1.2009499255 |
| 2 | 2.401899851 |
| 5 | 6.0047496275 |
| 10 | 12.009499255 |
| 25 | 30.0237481376 |
| 50 | 60.0474962752 |
| 100 | 120.0949925505 |
| 1,000 | 1,200.9499255049 |
From unit
Exactly 4.54609 liters.
Symbol: imp gal
To unit
Exactly 231 cubic inches.
Symbol: US gal
Keep converting
Source
Definitions are checked against NIST Handbook 44, Appendix C. Calculations use full internal precision before display rounding.
View the complete volume converterQuestions
Use the formula US gal = imp gal x 1.200949925505. 1 imperial gallon (imp gal) equals 1.200949925505 us gallon (US gal).
Both unit definitions use exact factors. Only the displayed decimal may be rounded.
