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Gallons to Liters Converter

Convert US gallons to liters instantly. Perfect for fuel efficiency calculations, cooking measurements, and liquid volume conversions.

Gallons to Liters Calculator
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Conversion Formula

Formula:

liters = gallons × 3.78541

Multiply the gallon value by 3.78541 to get liters. This conversion factor is based on the international definition where 1 US gallon equals exactly 3.78541 liters.

Common Gallons to Liters Conversions
Gallons (gal)Liters (L)Common Reference
1 gal3.79 LMilk jug
2 gal7.57 LLarge soda bottle
5 gal18.93 LWater cooler bottle
10 gal37.85 LSmall aquarium
20 gal75.71 LWater heater tank
50 gal189.27 LLarge drum
100 gal378.54 LIndustrial container
Real-World Example

Car Gas Tank Conversion

A car's gas tank holds 15 gallons. That's 56.78 liters.
Calculation: 15 × 3.78541 = 56.78 liters
Frequently Asked Questions