Gallon (UK) to Gallon (US) Converter
Volume · unit-converter
Convert Gallon (UK) to Gallon (US) with a fixed input and output unit, step-by-step formula line, and reference tables. All calculations use liter-based factors (US fluid measures, imperial UK units, SI cubic meters).
Calculator
From: Gallon (UK) (ukgal)
To: Gallon (US) (gal)
About Gallon (UK)
The UK imperial gallon is defined as approximately 4.54609 liters. It is larger than the US liquid gallon and is used for fuel and drinks labeling in the UK.
About Gallon (US)
The US liquid gallon is defined as 231 cubic inches (about 3.78541 liters). US recipes, fuel economy, and retail liquids typically use US gallons.
How to convert gallons (uk) to gallons (us)
1 gallon (uk) is equal to 1.20094992677388 gallon (us):
1 ukgal = (4.54609 L ÷ 3.78541178 L) gal = 1.20094992677388 gal
Each gallon (uk) is defined as 4.54609 L and each gallon (us) as 3.78541178 L, so one ukgal equals 4.54609 ÷ 3.78541178 gal = 1.20094992677388 gal.
Let V(ukgal) be the numeric value of the same volume measured in Gallon (UK) (ukgal), and V(gal) the value in Gallon (US) (gal). Then:
V(gal) = V(ukgal) × (4.54609 / 3.78541178)
Equivalently, divide by how many ukgal fit into one gal (liters per gal divided by liters per ukgal):
V(gal) = V(ukgal) ÷ 0.83267418374911
Or: gallon (us) = gallon (uk) ÷ 0.83267418374911
Examples
Example #1: Convert 20 ukgal to gallon (us)
20 ukgal = 20 ukgal × (4.54609/3.78541178) gal = 24.0189985355 gal
20 ukgal = 20 ukgal ÷ 0.83267418374911 = 24.0189985355 gal
Example #2: Convert 50 ukgal to gallon (us)
50 ukgal = 50 ukgal × (4.54609/3.78541178) gal = 60.0474963387 gal
50 ukgal = 50 ukgal ÷ 0.83267418374911 = 60.0474963387 gal
Summary
To convert Gallon (UK) to Gallon (US), multiply the value in ukgal by the ratio of liters per ukgal divided by liters per gal. Equivalently: value_gal = value_ukgal × (4.54609 / 3.78541178). Numerically, 1 ukgal equals 1.2009499267738846 gal.
Relationship context
You are converting between UK imperial fluid / volume (Gallons (UK)) and US customary fluid / volume (Gallons (US)). US and UK fluid measures differ (gallons, ounces, tablespoons); metric liters and cubic meters align with SI. The numeric factor used here is 1.200950e+0.
Conversion tables
| Gallon (UK) (ukgal) | Gallon (US) (gal) |
|---|---|
| 0.1 | 0.1200949927 |
| 1 | 1.2009499268 |
| 2 | 2.4018998535 |
| 3 | 3.6028497803 |
| 4 | 4.8037997071 |
| 5 | 6.0047496339 |
| 6 | 7.2056995606 |
| 7 | 8.4066494874 |
| 8 | 9.6075994142 |
| 9 | 10.808549341 |
| Gallon (UK) (ukgal) | Gallon (US) (gal) |
|---|---|
| 10 | 12.0094992677 |
| 20 | 24.0189985355 |
| 30 | 36.0284978032 |
| 40 | 48.037997071 |
| 50 | 60.0474963387 |
| 60 | 72.0569956064 |
| 70 | 84.0664948742 |
| 80 | 96.0759941419 |
| 90 | 108.08549341 |
| 100 | 120.094992677 |