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How to Convert Gallons to Liters
Multiply the US gallon value by 3.78541. One US liquid gallon contains exactly 231 cubic inches, equal to 3.785411784 liters.
Gallons to Liters Conversion Table
| Gallons | Liters |
|---|---|
| 0.5 | 1.89271 |
| 1 | 3.78541 |
| 2 | 7.57082 |
| 5 | 18.9271 |
| 10 | 37.8541 |
| 15 | 56.7812 |
| 20 | 75.7082 |
| 25 | 94.6352 |
| 50 | 189.27 |
| 100 | 378.541 |
| 250 | 946.353 |
| 500 | 1892.71 |
| 1000 | 3785.41 |
How Many Liters in a Gallon?
1 gallon equals 3.78541 liters. To convert any value, multiply the number of gallons by 3.78541.
Common Use Cases
Homeowners comparing fuel-oil, propane, and heating-oil delivery quotes need gallon-to-liter conversion when dealing with international suppliers or reading efficiency ratings published in liters. A 275-gallon oil tank holds about 1,041 liters, and knowing this helps evaluate consumption rates reported in either unit across different heating-system documentation.
Aquarium enthusiasts sizing tanks, calculating water-treatment chemical doses, and estimating filter flow rates frequently convert gallons to liters. A standard 55-gallon fish tank holds about 208.2 liters, and medication dosing instructions from European fish-health companies are always per liter, making this conversion essential for keeping fish healthy.
Automotive journalists and car buyers comparing fuel-economy figures across markets convert gallons to liters regularly. A car that achieves 30 miles per gallon uses fuel at a rate that can be re-expressed in liters per 100 km (about 7.84 L/100 km) for meaningful comparison with European and Asian vehicle specifications.