Volume Converter

Value

From

Result

Result0.264172
From unitlitre
To unitUS gallon
Conversion factor0.264172
Inverse factor3.785412
In other unitsmillilitre: 1000 cubic metre: 0.001 cubic centimetre: 1000 cubic foot: 0.035315 cubic inch: 61.023744 imperial gallon: 0.219969

A gallon is not a gallon

Converts volume between litres, cubic metres, gallons, pints and fluid ounces, and shows the same quantity in the rest of the units at once.

The metric side is easy: a litre is a cubic decimetre, a cubic metre is a thousand litres, and everything is a shift of the decimal point. The trouble starts with the imperial units, where one name covers two different measures.

A US gallon is 3.785 litres and an imperial one is 4.546. That twenty percent gap runs all the way down the scale: pints, quarts and ounces differ too. Which is why both systems are named explicitly in the list.

What this calculator shows

An exact conversion between the pair of units you pick
The conversion factor and its inverse
The same quantity in several other units at once

What to keep in mind

US units are the liquid measures; the US dry pint and quart differ and are not used here.
A US cup is taken as 236.6 millilitres, the legal labelling standard. Recipes often round it to 240.

FAQs

How many litres in a gallon?

3.785 in a US gallon and 4.546 in an imperial one. When a source does not specify, it usually means the US gallon.

How many millilitres in a fluid ounce?

29.57 in a US fluid ounce and 28.41 in an imperial one. Cosmetics labels normally use the US measure.

How many litres in a cubic metre?

Exactly a thousand. A cubic metre is a metre cube and a litre is a decimetre cube.

What is an oil barrel?

158.99 litres, or 42 US gallons. It applies to oil only: the beer barrel and the dry barrel are different.

Worked example

A litre in gallons

Input: 1 litre into US gallons

Output: 0.264172 gallons

Note: The same litre is 0.22 imperial gallons, a fifth less. That difference is exactly why miles-per-gallon figures from American and British cars cannot be compared directly.

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Volume Converter

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