Liters to Gallons Converter — US & UK Gallon Reference Table
Convert liters to US gallons or UK imperial gallons. Covers fuel, aquariums, and pool volumes. Includes a liters-to-gallons table and US vs UK gallon explanation.
There are two gallons in common use, and they're meaningfully different: the US liquid gallon (3.785 L) and the UK imperial gallon (4.546 L). The UK gallon is about 20% larger. This matters for fuel economy comparisons, aquarium sizing, and any recipe or specification that travels between countries.
Use CalcHub's liters to gallons converter to specify which gallon you mean, or use the tables below.
The Formulas
Liters to US gallons:US gallons = liters ÷ 3.78541UK gallons = liters ÷ 4.54609UK gallons = US gallons × 0.832674Liters to US Gallons Table
| Liters | US Gallons | Liters | US Gallons |
|---|---|---|---|
| 1 | 0.264 | 20 | 5.283 |
| 2 | 0.528 | 25 | 6.604 |
| 5 | 1.321 | 30 | 7.925 |
| 10 | 2.642 | 40 | 10.567 |
| 15 | 3.963 | 50 | 13.209 |
| — | — | 100 | 26.417 |
Liters to UK Gallons Table
| Liters | UK Gallons | Liters | UK Gallons |
|---|---|---|---|
| 1 | 0.220 | 20 | 4.399 |
| 2 | 0.440 | 25 | 5.499 |
| 5 | 1.100 | 30 | 6.599 |
| 10 | 2.200 | 50 | 10.998 |
Fuel Tank Capacities
Car fuel tanks are sold in liters in India, UK, and Europe — and in gallons in the US. Here's how common sizes compare:
| Tank Size (Liters) | US Gallons | UK Gallons |
|---|---|---|
| 35 L | 9.2 | 7.7 |
| 40 L | 10.6 | 8.8 |
| 45 L | 11.9 | 9.9 |
| 50 L | 13.2 | 11.0 |
| 60 L | 15.9 | 13.2 |
| 70 L | 18.5 | 15.4 |
| 80 L | 21.1 | 17.6 |
Aquariums
Aquarium sizes are listed in gallons in North America and liters elsewhere.
| Tank Description | Liters | US Gallons |
|---|---|---|
| Small desktop tank | 10 L | 2.6 gal |
| Beginner tank | 40 L | 10.6 gal |
| Standard community | 75 L | 19.8 gal |
| Medium display | 120 L | 31.7 gal |
| Large cichlid tank | 200 L | 52.8 gal |
| Reef/marine | 300 L | 79.3 gal |
Swimming Pools
Backyard pool volumes in the US are often discussed in gallons; elsewhere in liters.
| Pool Size | Liters | US Gallons |
|---|---|---|
| Small plunge pool | 10,000 L | 2,642 gal |
| Above-ground round (12 ft) | 19,000 L | 5,019 gal |
| Standard rectangular | 75,000 L | 19,813 gal |
| Olympic pool (50 m) | 2,500,000 L | 660,430 gal |
Why are there two different gallons?
The US gallon derives from the old English wine gallon (231 cubic inches). The UK imperial gallon was standardized later in 1824 as the volume of 10 pounds of water, which works out to 277.42 cubic inches — about 20% more than the US gallon.
How many liters in a US gallon?
Exactly 3.785411784 liters. For practical purposes, 3.785 L or roughly 3.8 L.
What's better for fuel economy — mpg or L/100km?
They're inverses of each other, which trips people up. Better fuel economy = higher mpg but lower L/100km. A car getting 35 mpg uses about 6.7 L/100km. A car getting 50 mpg uses about 4.7 L/100km.
Related Converters
- Volume Converter — includes pints, quarts, fluid oz
- Cups to ML Converter
- Fuel Cost Calculator