Gallons to Liters Converter
Convert US gallons to liters instantly with our free online calculator. Essential for fuel economy comparisons, cooking conversions, aquarium volumes, and international recipes.
Conversion Formula
| Conversion | Formula | Example |
|---|---|---|
| US gal to L | gal × 3.78541 | 10 gal = 37.85 L |
| L to US gal | L ÷ 3.78541 | 37.85 L = 10 gal |
| UK gal to L | gal × 4.54609 | 10 gal = 45.46 L |
US vs Imperial Gallon
| Type | Liters | Difference |
|---|---|---|
| US Gallon | 3.78541 L | Standard in USA |
| UK/Imperial Gallon | 4.54609 L | 20% larger |
Quick Reference Table
| US Gallons | Liters | Common Use |
|---|---|---|
| 1 gal | 3.79 L | Milk jug |
| 2.5 gal | 9.46 L | Small container |
| 5 gal | 18.93 L | Jerry can |
| 10 gal | 37.85 L | Aquarium |
| 15 gal | 56.78 L | Car fuel tank |
| 20 gal | 75.71 L | Large tank |
| 55 gal | 208.2 L | Standard drum |
Fuel Economy Conversion
Converting MPG to L/100km:
| MPG (US) | L/100km | Efficiency |
|---|---|---|
| 15 | 15.68 | Poor |
| 20 | 11.76 | Below average |
| 25 | 9.41 | Average |
| 30 | 7.84 | Good |
| 40 | 5.88 | Very good |
| 50 | 4.70 | Excellent |
Conversion Code Example
``javascript
function gallonsToLiters(gallons, isImperial = false) {
const factor = isImperial ? 4.54609 : 3.78541;
return gallons * factor;
}
function litersToGallons(liters, isImperial = false) {
const factor = isImperial ? 4.54609 : 3.78541;
return liters / factor;
}
function mpgToL100km(mpg) {
return 235.215 / mpg;
}
// Examples
console.log(gallonsToLiters(10)); // 37.8541
console.log(mpgToL100km(30)); // 7.84
``
Aquarium Sizes
| Gallons | Liters | Tank Type |
|---|---|---|
| 5 gal | 19 L | Betta tank |
| 10 gal | 38 L | Small community |
| 20 gal | 76 L | Medium tank |
| 40 gal | 151 L | Large tank |
| 75 gal | 284 L | Show tank |
| 125 gal | 473 L | Very large |
Cooking Measurements
| US Volume | Liters |
|---|---|
| 1 cup | 0.237 L |
| 1 pint | 0.473 L |
| 1 quart | 0.946 L |
| 1 gallon | 3.785 L |