Gallons to Liters Calculator
How many liters are in a given number of gallons? Convert fuel volume between gallons and liters.
Interactive inputs
Live result
30.00
MPG
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Answer first
How many liters are in a given number of gallons?
The Gallons to Liters converter helps you translate US fuel volumes into the metric liters used at gas stations worldwide. It is essential when comparing fuel prices internationally, understanding tank capacity for imported vehicles, or converting recipes and industrial measurements that use gallons.
Current calculator output
30.00
MPG
How it works
Gallons to Liters Calculator: inputs, formula, and result
This tool translates US liquid volume to metric by multiplying your gallons input by 3.78541. This provides the exact number of liters contained within the specified US gallon amount.
Formula
Liters = Gallons × 3.785412
Worked example
12 US gallons × 3.785412 = 45.42 liters.
Pro tip: UK Imperial gallons are larger than US gallons (1 Imperial gallon = 4.546 liters). Always confirm whether your source uses US or Imperial gallons before converting.
Personalized guidance
What changes the result for Gallons to Liters?
While the math is constant, the actual volume of fuel you pump can fluctuate slightly due to temperature expansion, pump calibration, and the specific density of the fuel. Traffic, tire pressure, vehicle load, terrain, driving style, weather, fuel price, and the quality of the input data can change the final result.
Estimated result condition
100%
Select factors that match this conversion calculation.
When should you use this calculator?
Use this when estimating fuel capacity for an imported vehicle or calculating how many liters you need to buy when crossing into a country that sells gas by the liter.
Selected usePlan with Gallons to Liters Calculator
FAQ
FAQs about Gallons to Liters
3 questions
Question 1 of 3 is open
What is the difference between a US gallon and an Imperial gallon?
A US gallon equals 3.785 liters, while an Imperial (UK) gallon equals 4.546 liters. The Imperial gallon is about 20% larger.
How many liters are in a typical US car fuel tank?
Most US sedans have a 45-65 liter (12-17 US gallon) tank. SUVs and trucks typically range from 75-130 liters (20-34 gallons).
Why do some countries price fuel per gallon and others per liter?
The US prices fuel per gallon, while most other countries use price per liter. To compare, divide the US per-gallon price by 3.785 to get a per-liter price.
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