Gallons to Liters Converter — US & UK Gallon Calculator
Convert gallons to liters and liters to gallons for USA (US gallon), UK (Imperial gallon), and Canada (liters). Live results, conversion charts, and fuel-volume examples.
Convert Gallons to Liters
Choose your gallon standard — US for America, UK Imperial for Britain.
Gallons to Liters Conversion Chart
US and UK gallon values side by side. Click a row to load the converter.
| Gallons | US → Liters | UK → Liters | Notes |
|---|
Fuel Tanks, Milk & Pool Volumes
Real-world volumes in the USA, UK, and Canada with liter equivalents.
| Item | Region | Volume | Liters |
|---|
US Gallon vs UK Imperial Gallon
| Country | Everyday unit | 1 gallon equals | Notes |
|---|---|---|---|
| United States | US liquid gallon | 3.785 L | Gas pumps, milk jugs, paint cans |
| United Kingdom | Imperial gallon | 4.546 L | Petrol sold in liters; gallon still used in older refs |
| Canada | Liters (metric) | — | Fuel & groceries in L; US gallon used near border & pools |
Batch Gallons to Liters
Convert multiple values at once — one per line or comma-separated.
Convert to All Volume Units
From gallons or liters to quarts, pints, cups, fl oz, and milliliters.
Volume Conversion Formulas
Exact factors used by this calculator.
How to Convert Gallons to Liters (USA, UK & Canada)
Liquid volume uses different gallon definitions depending on where you are. In the United States, one US liquid gallon = 3.785411784 liters exactly. In the United Kingdom, one Imperial (UK) gallon = 4.54609 liters. Canada officially uses liters for fuel, beverages, and most retail packaging — but US-gallon references still appear for swimming pools, cross-border shopping, and American product labels.
To convert gallons to liters, multiply by the correct factor. Example (US): 5 gal × 3.785 = 18.93 L. Example (UK): 5 Imperial gal × 4.546 = 22.73 L.
Gallons to liters chart
| Gallons | US gallons → L | UK gallons → L |
|---|---|---|
| 1 | 3.785 L | 4.546 L |
| 2 | 7.571 L | 9.092 L |
| 5 | 18.927 L | 22.730 L |
| 10 | 37.854 L | 45.461 L |
| 15 | 56.781 L | 68.191 L |
| 20 | 75.708 L | 90.922 L |
USA vs UK vs Canada — quick guide
- USA: Gas stations display price per US gallon. Milk is often sold in gallon jugs (3.785 L). Recipes may list cups and fluid ounces.
- UK: Petrol and diesel are sold in liters at the pump. The Imperial gallon survives in older vehicle specs and brewing traditions.
- Canada: Gasoline is priced per liter. A standard 4 L milk jug is common. Pool chemicals and US imports may reference US gallons.
Related volume tools
Gallons to Liters FAQ
How many liters in 1 US gallon?
1 US gallon = 3.785411784 liters (often rounded to 3.79 or 3.8 L).
How many liters in 1 UK Imperial gallon?
1 UK Imperial gallon = 4.54609 liters — about 20% more than a US gallon.
Does Canada use US gallons or liters?
Canada uses liters for everyday liquid measure (fuel, drinks, cooking). US gallons appear mainly on American imports and in informal pool-volume estimates.
How do I convert 50 liters to US gallons?
50 L ÷ 3.785411784 ≈ 13.21 US gallons. Swap units on this page for instant results.
Why are US and UK gallons different?
Historical standards diverged: the US gallon is based on 231 cubic inches, while the UK Imperial gallon was defined as the volume of 10 lb of water — yielding a larger unit still used in British Imperial measure.
Is a gallon the same as 4 liters?
Close for UK: 1 Imperial gallon ≈ 4.55 L. For the US, 1 gallon ≈ 3.79 L — so "4 liters per gallon" is only a rough UK approximation, not exact for either standard.
gallons_to_liters
2026-06-05 09:39:07
Taylor Bennett