Imperial gallons to US liquid gallons
Convert imperial gallons to us liquid gallons (imp gal to US gal). 1 imp gal = 1.2009499255 US gal. Use the calculator, formula and conversion table.
How to convert imperial gallons to us liquid gallons
Multiply the amount in imperial gallons by 1.2009499255 to get us liquid gallons. The displayed factor and results are rounded to 12 significant digits.
US gal = imp gal × 1.2009499255Worked example
1 imp gal = 1.2009499255 US gal. Change the amount in the calculator above to use your own value.
Units and assumptions
Units are labelled explicitly: US customary liquid cups and gallons differ from imperial units. One litre is 1,000 millilitres. This converts volume only; mass conversions need a density.
Calculator results use floating-point arithmetic and are rounded for display. The reference table below uses up to 12 significant digits.
Imperial gallons to US liquid gallons table
| Imperial gallons (imp gal) | US liquid gallons (US gal) |
|---|---|
| 0 | 0 |
| 1 | 1.2009499255 |
| 5 | 6.00474962752 |
| 10 | 12.009499255 |
| 25 | 30.0237481376 |
| 100 | 120.09499255 |
| 1,000 | 1,200.9499255 |
About this conversion
What is the formula for imperial gallons to us liquid gallons?
US gal = imp gal × 1.2009499255. Multiply the amount in imperial gallons by 1.2009499255 to get us liquid gallons. The displayed factor and results are rounded to 12 significant digits.
How do I convert back to imperial gallons?
Use the us liquid gallons to imperial gallons calculator to reverse this conversion. You can also use Swap units in the calculator above.
Can I use a different pair of units?
Choose another unit in the calculator, or open the volume converter to browse all supported pairs.