💧 Volume
Imperial gallons to US gallons Converter
Convert Imperial gallons to US gallons instantly with a reference conversion table.
Quick answer: To convert Imperial gallons to US gallons, multiply by 1.20095. For example, 1 Imperial gallons = 1.20095 US gallons. Use the calculator below for any value.
Imperial gallons to US gallons
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Common conversions
| Imperial gallons | US gallons |
|---|
Formula:
How to convert Imperial gallons to US gallons
1
Enter your value
Type the number of imperial gallons you want to convert into the left box. The result in us gallons appears instantly in the right box. You can also type into the right box to convert in the other direction.
2
Use the swap button
Click the ⇄ Swap button to reverse the conversion — US gallons to Imperial gallons. Your current value carries across so you don't have to re-enter anything.
3
About Imperial gallons and US gallons
Imperial gallons and US gallons are common volume measurements.
📊 Common conversions at a glance
| Imperial gallons | US gallons |
|---|---|
| 1 | 1.201 |
| 2 | 2.402 |
| 5 | 6.005 |
| 10 | 12.01 |
| 20 | 24.02 |
| 50 | 60.05 |
Reviewed for 2026. Imperial gallons ↔ US gallons conversion factor verified against published reference data. Built by a UK-based qualified primary teacher and FA Level 2 coach as part of 247QuickTools' free utility-tools project.