Volume Converter
Convert between litres, gallons, cubic metres, cups, pints and more.
What the Volume Converter does
Volume conversion is straightforward except for the gallon: a US gallon is 3.785 litres while an imperial gallon is 4.546 litres, about 20% larger. Recipes and fuel figures can be badly wrong if you mix them up.
Formula
Convert to litre, then divide by the target unit's factorResult = Value × (from factor ÷ to factor)
Inputs explained
| Input | Unit | Required | Notes |
|---|---|---|---|
| Value | number | Yes | — |
| From | one of 15 options | Yes | — |
| To | one of 15 options | Yes | — |
How to use it
- Choose From and To.
- Enter Value.
- Select Calculate.
Worked example
Convert 20 litres to US gallons.
- Value
- 20
- From
- Litre
- To
- US gallon
20 ÷ 3.7854 = 5.283 US gallons.
Frequently asked questions
Is a US gallon the same as a UK gallon?
No. An imperial gallon is 4.546 L, about 20% bigger than the 3.785 L US gallon.
How many millilitres in a cup?
A US cup is 236.59 ml. A metric cup is 250 ml, so recipes can differ slightly.