Gallon to Liter Converter
Enter the value that you want to convert gallon (gal) to liter (L) or liter to gallon.Also written as GAL to L conversion.
1 gallon = 4.5460900 liter
Formula: liter = gallon value × 4.5460900
GAL to L — gallon to liter
10 gallon = 45.46090 liter
Popular Volume Converters:
Gallon vs Liter
The Gallon Explained
Gallon (gal) is a unit of volume measurement. 1 gallon is equal to 4.5460900 liter.
The Liter Explained
Liter (L) is a unit of volume measurement. 1 liter is equal to 0.2199692 gallon.
Volume Measurement Systems
Volume units are particularly confusing because the US and UK gallons differ (US gallon = 3.785 L, UK gallon = 4.546 L), as do their pints, cups, and fluid ounces. Cooking, fuel economy, beverage production, and pharmaceutical compounding all require precise volume conversions. Laboratory work uses milliliters and liters while US recipes specify cups, tablespoons, and fluid ounces.
gallon to liter metric conversion table
| 0.01 gal | = | 0.04546 L |
| 0.1 gal | = | 0.45461 L |
| 1 gal | = | 4.54609 L |
| 2 gal | = | 9.09218 L |
| 3 gal | = | 13.63827 L |
| 4 gal | = | 18.18436 L |
| 5 gal | = | 22.73045 L |
| 6 gal | = | 27.27654 L |
| 7 gal | = | 31.82263 L |
| 8 gal | = | 36.36872 L |
| 9 gal | = | 40.91481 L |
| 10 gal | = | 45.46090 L |
| 11 gal | = | 50.00699 L |
| 12 gal | = | 54.55308 L |
| 13 gal | = | 59.09917 L |
| 14 gal | = | 63.64526 L |
| 15 gal | = | 68.19135 L |
| 16 gal | = | 72.73744 L |
| 17 gal | = | 77.28353 L |
| 18 gal | = | 81.82962 L |
| 19 gal | = | 86.37571 L |
| 20 gal | = | 90.92180 L |
| 30 gal | = | 136.38270 L |
| 40 gal | = | 181.84360 L |
| 50 gal | = | 227.30450 L |
| 60 gal | = | 272.76540 L |
| 70 gal | = | 318.22630 L |
| 80 gal | = | 363.68720 L |
| 90 gal | = | 409.14810 L |
| 100 gal | = | 454.60900 L |
| 200 gal | = | 909.21800 L |
| 300 gal | = | 1363.82700 L |
| 400 gal | = | 1818.43600 L |
| 500 gal | = | 2273.04500 L |
| 600 gal | = | 2727.65400 L |
| 700 gal | = | 3182.26300 L |
| 800 gal | = | 3636.87200 L |
| 900 gal | = | 4091.48100 L |
| 1000 gal | = | 4546.09000 L |
How to Convert GAL to L (Gallon to Liter)?
We can convert gallon to liter by using an example.
Example:
Convert 20 Gallon to Liter?
We know 1 Gallon = 4.5460900 liter; 1 Liter = 0.2199692 gallon.
20 gallon = ___L
20 × 4.5460900 = 90.92180 L (we know 1 gallon = 4.5460900 liter)
Answer:
20 gallon = 90.92180 liter
How to Convert UK (Imperial) Gallons to Liters (Step-by-Step)
The UK imperial gallon is larger than the US gallon and equals exactly 4.54609 liters. This conversion is needed for UK fuel economy figures, older British recipes, and understanding historical volume measurements still used in some Commonwealth countries.
- Write down the volume in UK (imperial) gallons.
- Multiply by 4.54609 to get liters.
- The result is the volume in liters.
- For a quick estimate, multiply by 4.5.
UK Gallons to Liters Reference
Imperial gallon volumes converted to liters for fuel and historical contexts:
| Gallon | Liter |
|---|---|
| 1 UK gal | 4.546 L |
| 2 UK gal | 9.092 L |
| 5 UK gal | 22.730 L |
| 10 UK gal | 45.461 L |
| 12 UK gal | 54.553 L |
| 15 UK gal | 68.191 L |
| 20 UK gal | 90.922 L |
| 100 UK gal | 454.609 L |
Solved Examples: UK Gallons to Liters
Question 1: A classic British car has a 12 imperial gallon fuel tank. Express in liters.
Solution:
Liters = UK gallons × 4.54609
= 12 × 4.54609
= 54.553 liters
Answer: 12 imperial gallons = 54.55 liters.
Question 2: A UK heating oil tank holds 300 imperial gallons. Convert to liters.
Solution:
Liters = 300 × 4.54609
= 1,363.83 liters
Answer: 300 imperial gallons = 1,363.8 liters (about 1.36 cubic meters).
Question 3: Convert 6.5 imperial gallons of paint to liters.
Solution:
Liters = 6.5 × 4.54609
= 29.55 liters
Answer: 6.5 imperial gallons ≈ 29.55 liters.
Practice Questions
Try solving these on your own to test your understanding:
- Convert 8 UK gallons to liters. (Answer: 36.37 L)
- A boat tank holds 25 imperial gallons. Express in liters. (Answer: 113.65 L)
- How many liters in 50 UK gallons? (Answer: 227.30 L)
- Convert 3.5 imperial gallons to liters. (Answer: 15.91 L)
- A water butt holds 40 imperial gallons. How many liters? (Answer: 181.84 L)
UK Fuel Economy: Imperial MPG vs. Metric L/100km
UK fuel economy is traditionally stated in miles per imperial gallon (MPG). To convert UK MPG to L/100km: divide 282.481 by the MPG figure. For example, a UK car rated at 50 MPG (imperial) uses 282.481 ÷ 50 = 5.65 L/100km. Note that UK MPG figures always look higher than US MPG for the same car because the imperial gallon is larger. A car getting 40 UK MPG ≈ 33 US MPG.
Historical Context: Why the Imperial Gallon Exists
The imperial gallon was defined in 1824 as the volume of 10 pounds of water at 62°F. This gave it 4.546 liters. The US had already adopted the Queen Anne wine gallon (231 cubic inches = 3.785 liters) in 1707, and kept it after independence. The two countries thus have different gallons, pints, quarts, and fluid ounces, all derived from their respective gallon definitions.
Key Takeaways
- Multiply UK (imperial) gallons by 4.54609 to get liters.
- The UK gallon (4.546 L) is 20% larger than the US gallon (3.785 L).
- 1 UK gallon = 1.201 US gallons.
- UK MPG figures are always higher than US MPG for the same vehicle.
- To convert UK MPG to L/100km: divide 282.481 by the MPG value.
- The imperial gallon is defined as the volume of 10 pounds of water.
Gallon to Liter Conversion Formula
liter = gallon × 4.5460900
1 gallon = 4.5460900 liter
1 liter = 0.2199692 gallon
Reverse: gallon = liter × 0.2199692
Frequently Asked Questions
How many liter are in 1 gallon?
There are 4.5460900 liter in 1 gallon. To convert gallon to liter, multiply the value by 4.5460900.
How do I convert gallon to liter?
Multiply your gallon value by 4.5460900 to get the equivalent in liter. For example, 5 gallon = 5 × 4.5460900 = 22.73045 liter.
How do I convert liter to gallon?
Multiply your liter value by 0.2199692 to get the equivalent in gallon. Alternatively, divide by 4.5460900.
What is 10 gallon in liter?
10 gallon is equal to 45.46090 liter.
What is 100 gallon in liter?
100 gallon is equal to 454.60900 liter.