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Convert liters to gallons
Convert liter (L) to gallon (us) (gal) instantly. Free, no signup, nothing is uploaded — everything runs in your browser.
Liter to Gallon (US) conversion table
| Liter [L] | Gallon (US) [gal] |
|---|---|
| 0.01 | 0.00264172 |
| 0.1 | 0.02641721 |
| 1 | 0.26417205 |
| 2 | 0.5283441 |
| 3 | 0.79251616 |
| 5 | 1.32086026 |
| 10 | 2.64172052 |
| 20 | 5.28344105 |
| 50 | 13.20860262 |
| 100 | 26.41720524 |
| 1,000 | 264.17205236 |
How to convert liter to gallon (us)
gal = L ÷ 3.78541
Example: 20 L = 20 ÷ 3.78541 = 5.2834 gal
To convert back (gallon (us) to liter): L = gal × 3.78541
What is a liter?
A liter (L) is a metric unit of volume equal to one cubic decimeter, or 1,000 cubic centimeters. The standard unit for beverage and liquid capacity in most of the world.
What is a gallon (us)?
A US gallon (gal) is a unit of volume in the US customary system, defined as exactly 3.785411784 liters. The standard unit for fuel and large liquid containers in the United States.
When do you need to convert liter to gallon (us)?
Fuel economy and fuel cost: outside the US, fuel is sold by the liter and consumption is measured in L/100 km; the US uses gallons and mpg. A car rated 8 L/100 km is about 29.4 mpg US. Comparing fuel costs across countries requires converting both volume (L vs gal) and consumption (L/100 km vs mpg). A 40 L tank is 10.57 US gal.
Aquariums, pools, and water tanks: a 200 L aquarium, a 5,000 L pool, a 60 L water heater tank. US-spec aquariums and tanks are often quoted in gallons, while the actual water treatment chemicals are dosed per liter. A fish tank treatment that says "5 mL per 40 L" needs to become "5 mL per 10.57 gal" for a US customer.
Beverages and food: bottled drinks, milk, juice, and bulk ingredients. A 2 L soda bottle is 0.528 gal; a US half-gallon of milk is 1.893 L. Cooking recipes that quote milliliters (1 cup = 240 mL) need gallon conversions for legacy US recipes, and vice versa. The 5 L wine box common in Europe is 1.32 gal in US terms.
Frequently asked questions
How many gallons is 1 liter?
1 L = 0.26417 US gallons, by exact definition (1 US gal = 3.785411784 L, agreed 1959). The reverse is 1 ÷ 3.78541 = 0.264172. So 4 L ≈ 1.057 gal, 20 L ≈ 5.283 gal, 50 L ≈ 13.21 gal, 100 L ≈ 26.42 gal.
How many liters is 1 gallon?
1 US gallon = 3.78541 liters, exact. So 5 gal = 18.93 L, 10 gal = 37.85 L, 15 gal = 56.78 L, 20 gal = 75.71 L. Note: this is US gallons; the UK (imperial) gallon is 4.54609 L — a 20% difference. Always confirm which gallon (US vs UK) is intended.
What is the difference between US gallons and UK (imperial) gallons?
US gallon = 3.78541 L, defined as 231 cubic inches. UK (imperial) gallon = 4.54609 L, defined as the volume of 10 lb of water at 62 °F. The UK gallon is about 20% larger. The US has never adopted the imperial gallon; the UK used the imperial gallon until the 1980s and now uses liters for most fuel sales. Canadian fuel is sold by the liter (since 1977) but some old references use the imperial gallon.
How do I convert mpg to L/100 km?
Divide 235.215 by the mpg value to get L/100 km. Example: 30 mpg US = 235.215 ÷ 30 = 7.84 L/100 km. The formula is derived from 1 gal = 3.78541 L and 1 mi = 1.60934 km, so 1 mpg = 1 mi/gal = 1.60934 km / 3.78541 L = 0.42514 km/L, and L/100 km = 100 ÷ (mpg × 0.42514) = 235.215 ÷ mpg. For reverse (L/100 km to mpg), divide 235.215 by the L/100 km value.