A US fuel figure
A 15-gallon tank is about 56.8 litres.
Use Gallons to Litres
Converts us gallons to litres in this tab, with nothing sent anywhere.
Runs entirely on your deviceThe conversion happens in this browser tab. Nothing you type is uploaded, logged or stored, which is worth knowing for anything you would not paste into a search box.
A 15 US-gallon fuel tank holds about 56.78 litres. The word gallon is ambiguous: an Imperial gallon is larger at 4.54609 litres, so figures from UK vehicle manuals should not be entered as US gallons.
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Browse all general convertersAbout Gallons to Litres
Gallons measure fuel and large liquids in the US, but the rest of the world sells and calculates in litres. Converting US gallons to litres turns an American volume into the metric figure the majority of the world uses. One US gallon is 3.785 litres, so a 15-gallon tank holds about 56.8 litres - the number a metric fuel pump or a European spec would give. Aquariums, fuel tanks and water heaters sold in the US quote gallons, so a metric owner needs litres to dose treatments, compare capacities or size a replacement correctly. Paint coverage on US tins is rated per gallon, so converting to litres tells a metric decorator how many tins a wall measured in square metres will need. Confirm whether the source specification uses US or imperial gallons before relying on a litre conversion.
Using Gallons to Litres
- Type a number of US gal. You can paste a value with its unit; the tool reads the number.
- The exact factor is applied and the result is shown as L, updating live as you type.
- Copy the answer, or switch to the reverse converter to go from L back to US gal.
Where gallons to litres helps
Both directions
Need the opposite? The L-to-US gal converter is linked below and uses the exact inverse factor.
Do not confuse tank volume with fuel economy
A quantity of 10 US gallons corresponds to about 37.85 litres. That is a volume conversion, whereas miles per gallon is a distance-per-volume ratio and cannot be converted by changing the gallon value alone. When comparing a container label or fuel receipt, verify US liquid gallons; the imperial gallon has a different capacity.
Before you use the result
- The result is rounded for readability, so a value converted and then converted back may differ in the last decimal place. The underlying factor is exact.
- Units in your input are ignored - only the number is read - so make sure the figure you type is really in US gal.
Questions about Gallons to Litres
How many litres in a gallon?
A US gallon is 3.785 litres; a UK imperial gallon is 4.546 litres. This tool converts the US gallon, so confirm which one an American source intends.
Is my data uploaded?
No. Gallons to Litres does the arithmetic in this browser tab; the value is calculated on your device and is not sent to a server.
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